CN206250974U - Dynamically boosted circuit and audio-frequence player device - Google Patents
Dynamically boosted circuit and audio-frequence player device Download PDFInfo
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- CN206250974U CN206250974U CN201621344466.4U CN201621344466U CN206250974U CN 206250974 U CN206250974 U CN 206250974U CN 201621344466 U CN201621344466 U CN 201621344466U CN 206250974 U CN206250974 U CN 206250974U
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Abstract
The utility model discloses a kind of dynamically boosted circuit and audio-frequence player device, and the circuit is used to provide driving power supply to power amplification system, and the circuit includes BOOST booster circuits, and input connection power supply, output end is connected with the power input of power amplification system；Signal deteching circuit, test side is connected with the power amplifier signal output part of power amplification system, and the power amplifier signal for being exported to power amplification system is detected, and exports corresponding detection signal；Peak holding circuit, input is connected with the output end of signal deteching circuit, is used to be exported the crest voltage of detection signal；Switching regulation circuit, input is connected with the output end of peak holding circuit, when the detection signal of peak holding circuit output is received, to adjust the conducting degree of its own switch, accordingly to control BOOST booster circuits to export corresponding supply voltage.The utility model improves the utilization rate of audio-frequence player device battery, extends the reproduction time of audio-frequence player device.
Description
Technical field
The utility model is related to audio frequency apparatus technical field, and more particularly to a kind of dynamically boosted circuit and audio are played and set
It is standby.
Background technology
Audio in the market is played in product, is substantially to the mode that power amplification system is powered and is exported by battery
Supply voltage boosted after export power amplification system again, to be powered to power amplification system, and no matter volume size, give
The voltage that power amplification system is powered all is fixed, so that when small volume is played, voltage is still higher, causes battery efficiency
Reduced with utilization rate, and then cause the endurance of battery to shorten, i.e., audio plays the reproduction time shortening of product.
Utility model content
Main purpose of the present utility model is to propose a kind of dynamically boosted circuit and audio-frequence player device, it is intended to improve audio
The utilization rate of playback equipment battery, extends the reproduction time of audio-frequence player device.
To achieve the above object, the utility model proposes a kind of dynamically boosted circuit, for providing driving to power amplification system
Power supply, the dynamically boosted circuit includes：
BOOST booster circuits, input connection power supply, output end is used for the power input with the power amplification system
Connection；
Signal deteching circuit, test side is used to be connected with the power amplifier signal output part of the power amplification system, for described
The power amplifier signal of power amplification system output is detected, and exports corresponding detection signal；
Peak holding circuit, input is connected with the output end of the signal deteching circuit, is used to the detection signal
Crest voltage exported；
Switching regulation circuit, input is connected with the output end of the peak holding circuit, to receive the peak
During the crest voltage of the detection signal of value holding circuit output, the conducting degree of its own switch is adjusted, it is described with corresponding control
BOOST booster circuits export corresponding supply voltage.
Preferably, the signal deteching circuit includes capacitor, first resistor and second resistance, the input of the capacitor
It is the input of the signal deteching circuit to hold, and the output end of the capacitor is connected with the first end of the first resistor, institute
The second end for stating first resistor is the output end of the signal deteching circuit, and is connected with the first end of the second resistance；Institute
State the second end ground connection of second resistance.
Preferably, the peak holding circuit includes voltage follower, simulated peak memory and discharge cell, the electricity
The in-phase input end for pressing follower is the input of the peak holding circuit, the inverting input of the voltage follower and institute
State the input interconnection of the output end and the simulated peak memory of voltage follower, the positive pole termination of the voltage follower
First power supply, the negative pole end ground connection of the voltage follower；The output end of the simulated peak memory and the discharge cell
Input and the switching regulation circuit controlled end interconnection, the output head grounding of the discharge cell.
Preferably, the simulated peak memory includes the first diode, 3rd resistor and the second electric capacity, the described 1st
The anode of pole pipe is the input of the simulated peak memory, the negative electrode of first diode and the of the 3rd resistor
One end connect, the second end of the 3rd resistor is the output end of the simulated peak memory, and with second electric capacity
First end is connected, the second end ground connection of second electric capacity.
Preferably, the discharge cell includes the 4th resistance and second electric capacity, and the first end of the 4th resistance is
The input of the discharge cell, and being connected with the first end of second electric capacity, the second end of the 4th resistance with it is described
The second end connection of the second electric capacity, and be grounded.
Preferably, the peak holding circuit also includes the 3rd electric capacity, the first end and the voltage of the 3rd electric capacity
The positive terminal of follower and first power supply are connected, the 3rd capacity earth.
Preferably, the switching regulation circuit includes switching tube, the 5th resistance, the 6th resistance, the 7th resistance and the 8th electricity
Resistance, the output end connection of peak holding circuit described in the first end of the 5th resistance, the second end of the 5th resistance and institute
State the controlled end connection of switching tube；The first end of the input of the switching tube and the 6th resistance, the 7th resistance
The feedback signal reception end interconnection of first end and the BOOST booster circuits, the output end of the switching tube is through the described 8th electricity
Resistance ground connection；Second end of the 6th resistance is connected with the output end of the BOOST booster circuits；The second of 7th resistance
End ground connection.
Preferably, the switching tube is N-MOS pipes.
Preferably, the BOOST booster circuits include main control chip, inductor, the second metal-oxide-semiconductor, the second diode, the 4th
Electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and the 8th electric capacity, the main control chip include supply pin, PWM controls pin, anti-
Feedback signal receives pin and grounding leg, the supply pin and the power supply, the first end of the 4th electric capacity, the 5th electricity
The first end interconnection of the first end of appearance, the first end of the 6th electric capacity and the inductor, the PWM control pin and described second
The source electrode connection of metal-oxide-semiconductor, the feedback signal reception pin is the feedback signal reception end of the BOOST booster circuits, described to connect
Lower margin is grounded；Second end of the 4th electric capacity, the second end of the 6th electric capacity and the second end of the 5th electric capacity connect
Ground；Second end of the inductor interconnects with the drain electrode of second metal-oxide-semiconductor and the anode of second diode；Described second
The source ground of metal-oxide-semiconductor；The negative electrode of second diode and the power input of the power amplification system, the 8th electric capacity
The first end interconnection of first end and the 7th electric capacity；Second end of the 7th electric capacity and the second end of the 8th electric capacity are equal
Ground connection.
The utility model also proposes a kind of audio-frequence player device, and the audio-frequence player device includes power amplification system and as above institute
The dynamically boosted circuit stated, the dynamically boosted circuit includes：BOOST booster circuits, input connection power supply, output end with
The power input connection of the power amplification system；Signal deteching circuit, the power amplifier signal output of test side and the power amplification system
End connection, for being detected to the power amplifier signal that the power amplification system is exported, and exports corresponding detection signal；Peak holding
Circuit, input is connected with the output end of the signal deteching circuit, is used to carry out the crest voltage of the detection signal defeated
Go out；Switching regulation circuit, input is connected with the output end of the peak holding circuit, to receive the peak holding
During the detection signal of circuit output, the conducting degree of its own switch is adjusted, accordingly to control the BOOST booster circuits to export
Corresponding supply voltage.
The dynamically boosted circuit of the utility model detects the power amplifier letter of the power amplification system output by signal deteching circuit
Number, and detection signal is exported to switching regulation circuit through peak holding circuit, switching regulation circuit is receiving the peak value
During the detection signal of holding circuit output, the conducting degree of its own switch is adjusted, accordingly to control the BOOST booster circuits
Corresponding supply voltage to power amplification system is exported, so, just can be according to the size of power amplifier signal accordingly for power amplification system is provided
Suitable operating voltage, improves the utilization rate of battery, extends the reproduction time of audio-frequence player device.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the high-level schematic functional block diagram that the dynamically boosted circuit of the utility model is applied in audio-frequence player device；
Fig. 2 is the electrical block diagram of dynamically boosted circuit in Fig. 1.
Drawing reference numeral explanation：
| Label | Title | Label | Title | Label | Title |
| 10 | BOOST booster circuits | U1 | Voltage follower | C1 | First electric capacity |
| 20 | Signal deteching circuit | R1 | First resistor | C2 | Second electric capacity |
| 30 | Peak holding circuit | R2 | Second resistance | C3 | 3rd electric capacity |
| 31 | Simulated peak memory | R3 | 3rd resistor | C4 | 4th electric capacity |
| 32 | Discharge cell | R4 | 4th resistance | C5 | 5th electric capacity |
| 40 | Switching regulation circuit | R5 | 5th resistance | C6 | 6th electric capacity |
| 41 | Switching tube | R6 | 6th resistance | C7 | 7th electric capacity |
| L1 | Inductor | R7 | 7th resistance | C8 | 8th electric capacity |
| IC1 | Main control chip | R8 | 8th resistance | D1 | First diode |
| Q2 | Second metal-oxide-semiconductor | VCC1 | First power supply | D2 | Second diode |
The realization of the utility model purpose, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality indicate (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality indicates to be only used for explaining relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality indicates also correspondingly to change therewith.
If in addition, relate to the description of " first ", " second " etc. in the utility model embodiment, should " first ", " the
Two " description etc. is only used for describing purpose, and it is not intended that indicating or implying its relative importance or implicit indicate meaning
The quantity of the technical characteristic for showing.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, when the combination appearance of technical scheme is conflicting or cannot realize it will be understood that this technical side
The combination of case does not exist, not within the protection domain of the utility model requirement yet.
The utility model proposes a kind of dynamically boosted circuit, for providing driving power supply to power amplification system.
Reference picture 1 and Fig. 2, in the embodiment of the utility model one, the dynamically boosted circuit includes BOOST booster circuits
10th, signal deteching circuit 20, peak holding circuit 30, switching regulation circuit 40.
In the present embodiment, BOOST booster circuits 10, its input connection power supply BAT, output end is used for and the work(
The power input AMP connections of place system；
The test side of signal deteching circuit 20 is used to be connected with the power amplifier signal output part AMP-OUT of the power amplification system,
Signal deteching circuit 20 is used to detect the power amplifier signal of the power amplification system output, and exports corresponding detection signal；
The input of peak holding circuit 30 is connected with the output end of the signal deteching circuit, and peak holding circuit 30 is used
Exported with by the crest voltage of the detection signal；
The input of switching regulation circuit 40 is connected with the output end of the peak holding circuit 30, peak holding circuit 30
When the crest voltage of detection signal of the output of the peak holding circuit 30 is received, to adjust the conducting of its own switch
Degree, accordingly to control the BOOST booster circuits 10 to export corresponding supply voltage.
It should be noted that in order to avoid detection signal suddenly disappears, or because detection signal is smaller, cause follow-up electricity
Road cannot receive the detection signal, and the present embodiment is protected by the peak value of 20 pairs of detection signals of input of peak holding circuit
Hold, to reduce the variable quantity of detection signal and improve the sensitivity that subsequent conditioning circuit processes small-signal.
In the present embodiment, BOOST booster circuits 10 are exported to work(after the power supply BAT that input is input into is boosted
The power input AMP of place system, operating voltage is provided with for power amplification system, is detected in the test side of signal deteching circuit 20
During the power amplifier signal of power amplification system output, signal deteching circuit 20 is defeated by the crest voltage of detection signal through peak holding circuit 30
Go out to switching regulation circuit 40, switching regulation circuit 40 adjusts the conducting journey of its own switch according to the size of detection signal
Degree, exports with after controlling BOOST booster circuits 10 to be boosted to supply voltage with corresponding step-up ratio.
Specifically, when minimum conduction threshold of the detection signal less than its own switch of switching regulation circuit 40, the switch is adjusted
Economize on electricity road 40 is not turned on, and BOOST booster circuits 10 are exported after being boosted to the supply voltage being input into minimum step-up ratio.Work as inspection
When survey signal is more than the minimum conduction threshold of its own switch of switching regulation circuit 40, and less than its own switch of switching regulation circuit 40
Maximum conduction threshold when, switching regulation circuit 40 accordingly adjusts its own conducting degree with the increase/reduction of detection signal,
And then control the step-up ratio of BOOST booster circuits 10 increase with switch conduction degree/reduce respective change so that output to power amplifier
The voltage of system respective change with the size of power amplifier output signal, in this way, improving power utilization rate.Opened when detection signal is more than
When closing the maximum conduction threshold of the regulation its own switch of circuit 40, now the switch of switching regulation circuit 40 is fully on so that control
BOOST booster circuits 10 processed are boosted with maximum step-up ratio to the supply voltage being input into, it is ensured that power amplification system obtains sufficient
Operating voltage.
The dynamically boosted circuit of the utility model detects the power amplifier of the power amplification system output by signal deteching circuit 20
Signal, and detection signal is exported to switching regulation circuit 40 through peak holding circuit 30, switching regulation circuit 40 is being received
During the detection signal of the output of the peak holding circuit 30, the conducting degree of its own switch is adjusted, to control the BOOST liters
Volt circuit 10 is exported to power amplification system after being boosted to the supply voltage being input into corresponding step-up ratio, so, just can basis
The size of power amplifier signal provides suitable operating voltage for power amplification system accordingly, improves the utilization rate of battery, and extension audio is broadcast
Put the reproduction time of equipment.
Reference picture 2, in a preferred embodiment, the signal deteching circuit 20 include capacitor C1, first resistor R1 and
The input of second resistance R2, the capacitor C1 is the input of the signal deteching circuit 20, and the capacitor C1's is defeated
Go out end to be connected with the first end of the first resistor R1, second end of the first resistor R1 is the signal deteching circuit 20
Output end, and be connected with the first end of the second resistance R2；The second end ground connection of the second resistance R2.
In the present embodiment, capacitor C1 is used to filter the noise signal in detection signal, first resistor R1 and second resistance
R2 detects the voltage of circuit 20 come adjustment signal by partial pressure of connecting, and exports detection signal.
Reference picture 2, in a preferred embodiment, above-mentioned peak holding circuit 30 includes voltage follower U1, simulated peak
Memory 31 and discharge cell 32, the in-phase input end of the voltage follower U1 is the input of the peak holding circuit 30
End, the output end and the simulated peak memory of the inverting input of the voltage follower U1 and the voltage follower U1
31 input interconnection, the positive pole of the voltage follower U1 terminates the first power supply VCC1, the negative pole of the voltage follower U1
End ground connection；The output end of the simulated peak memory 31 and the input of the discharge cell 32 and the switching regulation circuit
40 controlled end interconnection, the output head grounding of the discharge cell 32.
In the present embodiment, voltage follower U1 is therefore available due to input impedance very high and very low output impedance
The detection signal of input is carried out into buffering with the detection signal of output in realization to isolate, the driving force of detection signal is improved.Mould
Intending peak memory 31 is used to store the peak value of detection signal, and peak holding is carried out with to the detection signal being input into.Discharge cell
32 are used to be discharged when detection signal reduces.
With continued reference to Fig. 2, the simulated peak memory 31 preferably includes the first diode D1,3rd resistor R3 and second
The anode of electric capacity C2, the first diode D1 is the input of the simulated peak memory 31, the first diode D1
Negative electrode be connected with the first end of the 3rd resistor R3, second end of the 3rd resistor R3 is the simulated peak memory
31 output end, and be connected with the first end of the second electric capacity C2, the second end ground connection of the second electric capacity C2.
In the present embodiment, protected come the peak value to the detection signal being input into using the first diode D1 unilateral conductions
Hold.3rd resistor R3 is used to carry out partial pressure to the detection signal being input into, while it is additionally operable to adjust the charging rate of the second electric capacity C2,
So as to equal with the velocity of discharge of discharge cell 32 or close.Second electric capacity C2 is holding capacitor, in original state, now the
The voltage of two electric capacity C2 is equal to zero, and when the first diode D1 is turned on, the second electric capacity C2 proceeds by charging until detection signal
Peak value arrive, just stop charging so as to realize the purpose of peak holding.
With continued reference to Fig. 2, the discharge cell 32 preferably includes the 4th resistance R4 and the second electric capacity C2, the described 4th
The first end of resistance R4 is the input of the discharge cell 32, and is connected with the first end of the second electric capacity C2, described
Second end of four resistance R4 is connected with second end of the second electric capacity C2, and is grounded.
In the present embodiment, the second electric capacity C2 is used to, when the detection signal of input reduces, be discharged through the 4th resistance R4.
With continued reference to Fig. 2, above-mentioned peak holding circuit 30 still further comprises the 3rd electric capacity C3, the 3rd electric capacity C3's
First end is connected with the positive terminal and the first power supply VCC1 of the voltage follower U1, the 3rd electric capacity C3 ground connection.
In the present embodiment, the alternating component that the 3rd electric capacity C3 is used to filter in the first power supply VCC1 thinks voltage follower U1
Power supply, the first power supply VCC1 and power supply BAT can be same power supply, with cost-effective.
Reference picture 2, in a preferred embodiment, above-mentioned switching regulation circuit 40 includes switching tube 41, the 5th resistance R5, the
Six resistance R6, the 7th resistance R7 and the 8th resistance R8, peak holding circuit 30 is defeated described in the first end of the 5th resistance R5
Go out end connection, second end of the 5th resistance R5 is connected with the controlled end of the switching tube 41；The input of the switching tube 41
Hold the feedback with the first end, the first end of the 7th resistance R7 and the BOOST booster circuits 10 of the 6th resistance R6
Signal receiving end is interconnected, and the output end of the switching tube 41 is grounded through the 8th resistance R8；The second of the 6th resistance R6
End is connected with the output end of BOOST booster circuits 10；The second end ground connection of the 7th resistance R7.
In the present embodiment, the resistance R8 of switching tube 41 and the 8th composition adjustable resistance, switching tube 41 with detection signal size
And the conducting degree of itself is adjusted, so that the resistance of adjustable resistance is adjusted, with after adjustable resistance is in parallel with the 7th resistance R7
Six resistance R6 connect partial pressure, so that output feedback signal is to BOOST booster circuits 10.When detection signal is less than switching tube 41 most
During small conduction threshold, switching tube 41 is not turned on, and now equivalent to infinity, the voltage of feedback signal is the resistance of adjustable resistance
The voltage of the output of BOOST booster circuits 10.When minimum conduction threshold of the detection signal more than switching tube 41, and less than switching tube 41
Maximum conduction threshold when, now the conducting degree of switching tube 41 increases with the increase of detection signal, the resistance of adjustable resistance
Reduce with the conducting degree increase of switch, the voltage of feedback signal is after adjustable resistance is connected with the 6th resistance R6 after partial pressure
Voltage.When maximum conduction threshold of the detection signal more than switching tube 41, now the switch of switching tube 41 is fully on, adjustable
The resistance of resistance is zero, and the voltage of feedback signal is the voltage at the two ends of the 6th resistance R6.
In the present embodiment, the switching tube 41 is preferably N-MOS pipes, and certain switching tube 41 can also have switch for other
The electronic switch of characteristic, is not restricted herein.
Reference picture 2, in a preferred embodiment, above-mentioned BOOST booster circuits 10 include main control chip IC1, inductor L1,
Second metal-oxide-semiconductor Q2, the second diode D2, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the electricity of the 7th electric capacity C7 and the 8th
Hold C8, the main control chip IC1 includes supply pin VCC, PWM control pin PWM, feedback signal reception pin FB and grounding leg GND, institute
State the supply pin VCC and power supply BAT, the first end of the 4th electric capacity C4, the first end of the 5th electric capacity C5,
The first end interconnection of the first end of six electric capacity C6 and the inductor L1, the PWM controls pin PWM and the second metal-oxide-semiconductor Q2
Source electrode connection, the feedback signal reception pin FB is the feedback signal reception end of the BOOST booster circuits 10, the ground connection
Pin GND is grounded；The second of second end of the 4th electric capacity C4, second end of the 6th electric capacity C6 and the 5th electric capacity C5
End is grounded；Second end of the inductor L1 and the drain electrode of the second metal-oxide-semiconductor Q2 and the anode of the second diode D2
Interconnection；The source ground of the second metal-oxide-semiconductor Q2；The negative electrode of the second diode D2 and the power input of the power amplification system
The first end interconnection of end AMP, the first end of the 8th electric capacity C8 and the 7th electric capacity C7；The second of the 7th electric capacity C7
Second end of end and the 8th electric capacity C8 is grounded.
In the present embodiment, power supply BAT can be the rechargeable batteries such as lithium battery, certainly in other embodiments, may be used also
Think other power supplys, be not limited herein.Second diode D2 preferably uses the less Schottky diode of forward voltage drop, so that
More energy are exported to power amplification system.Inductor L1 is used to convert electrical energy into Magnetic Energy Storage.The PWM of Master control chip
Control pin PWM is used to receive feedback signal according to feedback signal reception pin FB to export PWM controls to control the second metal-oxide-semiconductor Q2 to lead
Logical/shut-off.
When the pwm control signal of PWM control pin PWM outputs controls the second metal-oxide-semiconductor Q2 to turn on, due to the second diode D2
Buffer action, i.e., when MOS switch pipe 41 is closed, the cathode voltage of the second diode D2 is forced down than negative electricity, now second
The reverse-biased cut-offs of diode D2, inductor L1 converts electrical energy into magnetic energy and is stored.
When the pwm control signal of PWM control pin PWM outputs controls the second metal-oxide-semiconductor Q2 to turn off, now the second diode D2
Forward conduction.The magnetic energy of storage is converted to electric field energy by inductor L1, and this energy leads to after being superimposed with input supply voltage
Crossing the second diode D2 carries out rectification and obtains smooth DC voltage after the 7th electric capacity C7 and the 8th electric capacity C8 is filtered
Output is formed to power amplification system after being converted to the superposition of electric energy due to magnetic energy that this voltage is supply voltage and inductor L1
, so now output voltage is higher than input voltage, so as to complete the process to supply voltage boosting.
To sum up, the dynamically boosted circuit of the utility model detects the power amplification system output by signal deteching circuit 20
Power amplifier signal, and detection signal is exported to switching regulation circuit 40 through peak holding circuit 30, switching regulation circuit 40 is connecing
When receiving the detection signal of the output of the peak holding circuit 30, the conducting degree of its own switch is adjusted, accordingly to control institute
State BOOST booster circuits 10 and export corresponding supply voltage to power amplification system, so, just can be corresponding according to the size of power amplifier signal
Provide suitable operating voltage for power amplification system, improve the utilization rate of battery, extend the reproduction time of audio-frequence player device.
The utility model also proposes a kind of audio-frequence player device.
The audio-frequence player device includes power amplification system and as described above dynamically boosted circuit, the BOOST booster circuits
Output end be connected with the power input of the power amplification system；The power amplifier signal output part of the power amplification system and the signal
Detect the test side connection of circuit.The detailed construction of the dynamically boosted circuit can refer to above-described embodiment, and here is omitted；
It is understood that due to having used above-mentioned dynamically boosted circuit in the utility model electric equipment, therefore, the utility model
The embodiment of electric equipment includes whole technical schemes of above-mentioned dynamically boosted circuit whole embodiments, and the technology effect for being reached
Fruit is also identical, will not be repeated here.
In the present embodiment, the audio-frequence player device can be broadcast for audios such as MP3, Bluetooth audio amplifier, Wi-Fi audio amplifiers
Equipment is put, this is not restricted.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
It is every under inventive concept of the present utility model, the equivalent structure made using the utility model specification and accompanying drawing content is become
Change, or directly/be used in other related technical fields indirectly and be included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of dynamically boosted circuit, for providing driving power supply to power amplification system, it is characterised in that the dynamically boosted circuit bag
Include：
BOOST booster circuits, input connection power supply, output end is used to connect with the power input of the power amplification system
Connect；
Signal deteching circuit, test side is used to be connected with the power amplifier signal output part of the power amplification system, for the power amplifier
The power amplifier signal of system output is detected, and exports corresponding detection signal；
Peak holding circuit, input is connected with the output end of the signal deteching circuit, is used to the peak of the detection signal
Threshold voltage is exported；
Switching regulation circuit, input is connected with the output end of the peak holding circuit, to receive the peak value guarantor
During the crest voltage of the detection signal for holding circuit output, the conducting degree of its own switch is adjusted, accordingly to control the BOOST
Booster circuit exports corresponding supply voltage.
2. dynamically boosted circuit as claimed in claim 1, it is characterised in that the signal deteching circuit includes capacitor, the
One resistance and second resistance, the input of the capacitor are the input of the signal deteching circuit, the capacitor it is defeated
Go out end to be connected with the first end of the first resistor, the second end of the first resistor is the output of the signal deteching circuit
End, and be connected with the first end of the second resistance；The second end ground connection of the second resistance.
3. dynamically boosted circuit as claimed in claim 2, it is characterised in that the peak holding circuit includes voltage follow
Device, simulated peak memory and discharge cell, the in-phase input end of the voltage follower is the defeated of the peak holding circuit
Enter end, the output end of the inverting input of the voltage follower and the voltage follower and the simulated peak memory
Input is interconnected, and the positive pole of the voltage follower terminates the first power supply, the negative pole end ground connection of the voltage follower；The mould
Intend the controlled end interconnection of the output end of peak memory and the input of the discharge cell and the switching regulation circuit, it is described
The output head grounding of discharge cell.
4. dynamically boosted circuit as claimed in claim 3, it is characterised in that the simulated peak memory includes the one or two pole
Pipe, 3rd resistor and the second electric capacity, the anode of first diode is the input of the simulated peak memory, described the
The negative electrode of one diode is connected with the first end of the 3rd resistor, and the second end of the 3rd resistor is deposited for the simulated peak
The output end of reservoir, and be connected with the first end of second electric capacity, the second end ground connection of second electric capacity.
5. dynamically boosted circuit as claimed in claim 4, it is characterised in that the discharge cell includes the 4th resistance and described
Second electric capacity, the first end of the 4th resistance is the input of the discharge cell, and with the first end of second electric capacity
Connection, the second end of the 4th resistance is connected with the second end of second electric capacity, and is grounded.
6. dynamically boosted circuit as claimed in claim 3, it is characterised in that the peak holding circuit also includes the 3rd electricity
Hold, the first end of the 3rd electric capacity is connected with the positive terminal of the voltage follower and first power supply, the 3rd electricity
The the second end ground connection held.
7. dynamically boosted circuit as claimed in claim 1, it is characterised in that the switching regulation circuit includes switching tube, the
Five resistance, the 6th resistance, the 7th resistance and the 8th resistance, the first end of the 5th resistance are defeated with the peak holding circuit
Go out end connection, the second end of the 5th resistance is connected with the controlled end of the switching tube；The input of the switching tube and institute
The feedback signal reception end for stating the first end, the first end of the 7th resistance and the BOOST booster circuits of the 6th resistance is mutual
Even, the output end of the switching tube is through the 8th resistance eutral grounding；Second end of the 6th resistance rises piezoelectricity with the BOOST
The output end connection on road；The second end ground connection of the 7th resistance.
8. dynamically boosted circuit as claimed in claim 7, it is characterised in that the switching tube is N-MOS pipes.
9. the dynamically boosted circuit as described in claim 1 to 8 any one, it is characterised in that the BOOST booster circuits bag
Include main control chip, inductor, the second metal-oxide-semiconductor, the second diode, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and
8th electric capacity, the main control chip includes supply pin, PWM controls pin, feedback signal reception pin and grounding leg, the supply pin with
The power supply, the first end of the 4th electric capacity, the first end of the 5th electric capacity, the first end of the 6th electric capacity and described
The first end interconnection of inductor, the PWM controls pin is connected with the grid of second metal-oxide-semiconductor, the feedback signal reception pin
It is the feedback signal reception end of the BOOST booster circuits, the grounding leg ground connection；It is second end of the 4th electric capacity, described
Second end of the second end of the 6th electric capacity and the 5th electric capacity is grounded；Second end of the inductor and the 2nd MOS
The anode interconnection of the drain electrode of pipe and second diode；The source ground of second metal-oxide-semiconductor；The moon of second diode
Pole interconnects with the first end of the power input, the first end of the 8th electric capacity and the 7th electric capacity of the power amplification system；
Second end of the 7th electric capacity and the second end of the 8th electric capacity are grounded.
10. a kind of audio-frequence player device, it is characterised in that the audio-frequence player device includes power amplification system and such as claim 1
Dynamically boosted circuit described in 9 any one, the output end of the BOOST boost modules is defeated with the power supply of the power amplification system
Enter end connection；The power amplifier signal output part of the power amplification system is connected with the test side of the signal detection module.
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| CN201621344466.4U CN206250974U (en) | 2016-12-08 | 2016-12-08 | Dynamically boosted circuit and audio-frequence player device |
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| CN201621344466.4U CN206250974U (en) | 2016-12-08 | 2016-12-08 | Dynamically boosted circuit and audio-frequence player device |
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| CN109068242A (en) * | 2018-08-27 | 2018-12-21 | 上海艾为电子技术股份有限公司 | A kind of digital audio power amplification system |
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