CN207304495U - It is a kind of that relatively low power amplifier is lost - Google Patents
It is a kind of that relatively low power amplifier is lost Download PDFInfo
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- CN207304495U CN207304495U CN201721390074.6U CN201721390074U CN207304495U CN 207304495 U CN207304495 U CN 207304495U CN 201721390074 U CN201721390074 U CN 201721390074U CN 207304495 U CN207304495 U CN 207304495U
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- 239000003990 capacitor Substances 0.000 claims description 44
- 230000005611 electricity Effects 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
Relatively low power amplifier is lost the utility model discloses a kind of, including voltage-controlled attenuator, integrated amplifier, driving stage power amplifier and final power amplifier, the voltage-controlled attenuator receives radiofrequency signal and control signal, the voltage-controlled attenuator, integrated amplifier, driving stage power amplifier and final power amplifier are sequentially connected, and the final power amplifier exports radiofrequency signal；The voltage-controlled attenuator is used for the adjusting of power amplifier output power；The integrated amplifier is used for high linearity and high-gain；The driving stage power amplifier is used to improve signal driving power；The final power amplifier is used for being further amplified for signal；The utility model effectively reduces loss it is achieved thereby that reducing the attenuation loss of whole power amplifier by voltage-controlled attenuator, integrated amplifier, driving stage power amplifier and the mutual cooperation of final power amplifier and voltage-controlled attenuator.
Description
Technical field
It the utility model is related to amplifier, and in particular to a kind of that relatively low power amplifier is lost.
Background technology
Radio-frequency power amplifier (RF PA) is the important component of various transmitting sets.In the prime electricity of transmitter
Lu Zhong, RF signal power very little caused by modulation oscillator circuit by one buffer stage of a series of amplification, centre, it is necessary to put
Big level, final power amplifying stage, after obtaining enough radio-frequency powers, can just be fed on antenna and radiate.In order to obtain
Sufficiently large radio frequency power output, it is necessary to using radio-frequency power amplifier.Radio-frequency power amplifier is to output power, excitation electricity
The problems such as flat, power consumption, distortion, efficiency, size and weight, makees the electronic circuit considered.In emission system, radio-frequency power
The scope of amplifier output power can be as small as mW, big to number kW, but this refers to the output power of final power amplifier.For
Realize high-power output, penultimate stage just must have sufficiently high exciting power level.
The key technical indexes of radio-frequency power amplifier is output power and efficiency, is the pass for studying radio-frequency power amplifier
Key.And to the requirement of power transistor, mainly consider the parameters such as breakdown voltage, maximum collector current and maximum power dissipation.For
The effective energy transmission of realization, needs to use impedance matching network between Antenna+Amplifier.Power of the prior art is put
Big device attenuation loss is higher so that distorted signals is larger.
Utility model content
Technical problem to be solved in the utility model is that power amplifier attenuation loss of the prior art is higher so that
Distorted signals is larger, and it is an object of the present invention to provide a kind of be lost relatively low power amplifier, reduces the attenuation loss of power amplifier.
The utility model is achieved through the following technical solutions：
It is a kind of that relatively low power amplifier, including voltage-controlled attenuator, integrated amplifier, driving stage power amplification is lost
Device and final power amplifier, the voltage-controlled attenuator receive radiofrequency signal and control signal, the voltage-controlled attenuator, preposition work(
Rate amplifier, driving stage power amplifier and final power amplifier are sequentially connected, and the final power amplifier believes radio frequency
Number output；The voltage-controlled attenuator is used for the adjusting of power amplifier output power；The integrated amplifier is used for high line
Property degree and high-gain；The driving stage power amplifier is used to improve signal driving power；The final power amplifier is used for
Signal is further amplified；The voltage-controlled attenuator includes DC power supply V1, DC power supply V2, electrolytic capacitor C2, electrolytic capacitor
C3, electrolytic capacitor C4, electrolytic capacitor C5, electrolytic capacitor C6, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance
R8, diode D1, diode D2, diode D3, diode D4, the plus earth of the electrolytic capacitor C2, its anode and direct current
The cathode connection of power supply V1；The anode of the diode D1 is connected with the anode of diode D3, and described resistance R3 one end is connected to
On the circuit that electrolytic capacitor C2 is connected with DC power supply V1, its other end is connected to the circuit that diode D1 is connected with diode D3
On；The cathode of diode D1 is connected with the cathode of diode D2, resistance R4 and resistance the R5 series connection, the sun of the diode D2
Pole is connected the other end connection at resistance R5 ends with resistance R4；The other end connection diode D4 at the resistance R5 connections resistance R4 ends
Anode, the cathode of the diode D4 is connected with the cathode of diode D3；The anode of the electrolytic capacitor C3 is connected to two poles
On the circuit that pipe D1 is connected with diode D2, its minus earth；Described resistance R8 one end is connected to electrolytic capacitor C3 and diode
On the circuit of D1 connections；The anode of the electrolytic capacitor C4 is connected on the circuit that diode D3 is connected with diode D4, it is cloudy
Pole is grounded；Described resistance R7 one end is connected on the circuit that electrolytic capacitor C4 is connected with diode D3；Resistance R6 one end is connected to
On the circuit that resistance R4 is connected with resistance R5, the cathode of its other end and DC power supply V2, its anode ground connection；The electrolytic capacitor
The anode of C6 is connected on the circuit that diode D2 is connected with resistance R4, the anode of its anode connection DC power supply V2；The electricity
The anode of solution capacitance C5 is connected on the circuit that diode D4 is connected with resistance R5, the anode of its anode connection DC power supply V2.
The utility model can reach output power and be more than 53dB, and near 3dB, power amplifier integrally increases input signal
Benefit needs to be more than 50dB,.The utility model uses three-level structure for amplifying, respectively preposition, driving and final amplifier, less
Input signal first passes around voltage-controlled adjustable attenuator, which is mainly used for the adjusting of power amplifier output power.Input letter
Number by three-level circuit amplification after, exported in output terminal after coupler.Coupled signal obtains electricity after overdamping and detection
Signal is pressed, and then obtains output of the control signal to amplifier and is controlled.Gain per level-one amplifying circuit be followed successively by 15dB,
25dB, 20dB, first order amplifier generally mainly consider high-gain and high linearity, and bandwidth of operation should be wide in addition.This practicality
New power amplifier be mainly used for microwave source exploitation, therefore linear index etc. is required it is relatively low, primary concern is that fully
Obtain the work efficiency and output power of higher amplifier.The function of second level amplifier is to obtain larger signal driving work(
Rate meets the input requirements of final stage chip, and last signal amplifies desired output power through final stage.
For the voltage-controlled attenuator of the utility model based on π type attenuators, what diode was selected is HSMP-3814 pipes, by
The low distortion diode composition of two anode necklaces, each diode have the preferable linearity and relatively low cutoff frequency,
Due to the influence of stray inductance, voltage-controlled attenuator upper limit operation frequency is about 3GHz.Resistance in π type attenuator circuits is with two two
Pole pipe replacement can simplify biasing networks, can additionally improve maximum attenuation value, connect instead of two diode reverses of resistance
Connect, phase difference 180 degree, can eliminate the even-order harmonic distortion in signal.Resistance R4 and resistance R5 is corresponding diode
Biasing resistance, its resistance value choose need it is sufficiently large reduce insertion loss, remaining resistance is used to adjust the electric current between diode
Distribution.
Further, integrated amplifier include resistance R1, resistance R2, resistance Rg1, resistance Rg2, electrolytic capacitor C1,
Amplifier U1, amplifier U2 and amplifier U3, the amplifier U2 use INA121, the amplifier U3 to use INA128, institute
The 1 pin connection resistance R1 of amplifier U2 is stated, the resistance R1 connects with resistance R2, and the resistance R2 draws with the 8 of amplifier U2
Foot connects；Described resistance Rg1 one end is connected on the circuit that resistance R1 is connected with amplifier U2, its other end and electrolytic capacitor C1
Anode connection, the cathode of the electrolytic capacitor C1 is connected on the circuit that resistance R2 is connected with amplifier U2；The amplifier
The positive input of U1 is connected on the circuit that resistance R1 is connected with resistance R2；5 pins of amplifier U2 draw with the 2 of amplifier U3
Foot connects, and 6 pins of the amplifier U2 are connected with 3 pins of amplifier U3, and the resistance Rg2 is connected to drawing for amplifier U3
Between foot and 8 pins.Integrated amplifier employs the pre-amplification circuit that two instrument amplifiers collectively form, due to every
Straight capacitance is connected with resistance Rg1, and front-located power amplifier can reduce cost using INA121.
Further, driving stage power amplifier uses RA07H4047M.
The utility model compared with prior art, has the following advantages and advantages：The utility model passes through voltage-controlled
Attenuator, integrated amplifier, mutual cooperation and the voltage-controlled decay for driving stage power amplifier and final power amplifier
Device effectively reduces loss it is achieved thereby that reducing the attenuation loss of whole power amplifier.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, does not form the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model voltage-controlled attenuator structure diagram；
Fig. 3 is the utility model integrated amplifier structure diagram.
Embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model, is not intended to limit the scope of the present invention.
Embodiment
As shown in Figure 1 to Figure 3, it is a kind of that relatively low power amplifier, including the amplification of voltage-controlled attenuator, topping power is lost
Device, driving stage power amplifier and final power amplifier, the voltage-controlled attenuator receives radiofrequency signal and control signal, described
Voltage-controlled attenuator, integrated amplifier, driving stage power amplifier and final power amplifier are sequentially connected, the final stage work(
Rate amplifier exports radiofrequency signal；The voltage-controlled attenuator is used for the adjusting of power amplifier output power；The preposition work(
Rate amplifier is used for high linearity and high-gain；The driving stage power amplifier is used to improve signal driving power；The end
Stage power amplifier is used for being further amplified for signal；The voltage-controlled attenuator includes DC power supply V1, DC power supply V2, electrolysis
Capacitance C2, electrolytic capacitor C3, electrolytic capacitor C4, electrolytic capacitor C5, electrolytic capacitor C6, resistance R3, resistance R4, resistance R5, resistance
R6, resistance R7, resistance R8, diode D1, diode D2, diode D3, diode D4, the cathode of the electrolytic capacitor C2 connect
Ground, its anode are connected with the cathode of DC power supply V1；The anode of the diode D1 is connected with the anode of diode D3, the electricity
Resistance R3 one end is connected on the circuit that electrolytic capacitor C2 is connected with DC power supply V1, its other end is connected to diode D1 and two poles
On the circuit of pipe D3 connections；The cathode of diode D1 is connected with the cathode of diode D2, resistance R4 and resistance the R5 series connection, institute
State the anode of diode D2 and resistance R4 is connected the other end connection at resistance R5 ends；The resistance R5 connections resistance R4 ends it is another
The anode of end connection diode D4, the cathode of the diode D4 are connected with the cathode of diode D3；The electrolytic capacitor C3's
Anode is connected on the circuit that diode D1 is connected with diode D2, its minus earth；Described resistance R8 one end is connected to electrolysis
On the circuit that capacitance C3 is connected with diode D1；The anode of the electrolytic capacitor C4 is connected to diode D3 and is connected with diode D4
Circuit on, its minus earth；Described resistance R7 one end is connected on the circuit that electrolytic capacitor C4 is connected with diode D3；Resistance
R6 one end is connected on the circuit that resistance R4 is connected with resistance R5, the cathode of its other end and DC power supply V2, its anode ground connection；
The anode of the electrolytic capacitor C6 is connected on the circuit that diode D2 is connected with resistance R4, its anode connection DC power supply V2's
Anode；The anode of the electrolytic capacitor C5 is connected on the circuit that diode D4 is connected with resistance R5, its anode connection direct current
The anode of source V2.Driving stage power amplifier uses RA07H4047M.
Integrated amplifier include resistance R1, resistance R2, resistance Rg1, resistance Rg2, electrolytic capacitor C1, amplifier U1,
Amplifier U2 and amplifier U3, the amplifier U2 use INA121, the amplifier U3 to use INA128, the amplifier U2
1 pin connection resistance R1, the resistance R1 connects with resistance R2, and the resistance R2 is connected with 8 pins of amplifier U2；It is described
Resistance Rg1 one end is connected on the circuit that resistance R1 is connected with amplifier U2, its other end is connected with the anode of electrolytic capacitor C1,
The cathode of the electrolytic capacitor C1 is connected on the circuit that resistance R2 is connected with amplifier U2；The positive input of the amplifier U1
End is connected on the circuit that resistance R1 is connected with resistance R2；5 pins of amplifier U2 are connected with 2 pins of amplifier U3, described
6 pins of amplifier U2 are connected with 3 pins of amplifier U3, the resistance Rg2 be connected to amplifier U3 pin and 8 pins it
Between.
Above-described embodiment, the purpose of this utility model, technical solution and beneficial effect have been carried out into
One step describes in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, where within the spirit and principles of the present invention, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of be lost relatively low power amplifier, it is characterised in that including voltage-controlled attenuator, integrated amplifier, driving
Stage power amplifier and final power amplifier, the voltage-controlled attenuator receive radiofrequency signal and control signal, described voltage-controlled to decline
Subtract device, integrated amplifier, driving stage power amplifier and final power amplifier to be sequentially connected, the final power amplification
Device exports radiofrequency signal；The voltage-controlled attenuator is used for the adjusting of power amplifier output power；The topping power amplification
Device is used for high linearity and high-gain；The driving stage power amplifier is used to improve signal driving power；The final power
Amplifier is used for being further amplified for signal；The voltage-controlled attenuator includes DC power supply V1, DC power supply V2, electrolytic capacitor
C2, electrolytic capacitor C3, electrolytic capacitor C4, electrolytic capacitor C5, electrolytic capacitor C6, resistance R3, resistance R4, resistance R5, resistance R6, electricity
R7, resistance R8, diode D1, diode D2, diode D3, diode D4 are hindered, the plus earth of the electrolytic capacitor C2, it is negative
Pole is connected with the cathode of DC power supply V1；The anode of the diode D1 is connected with the anode of diode D3, the resistance R3 mono-
End is connected on the circuit that electrolytic capacitor C2 is connected with DC power supply V1, its other end is connected to diode D1 and diode D3 and connects
On the circuit connect；The cathode of diode D1 is connected with the cathode of diode D2, resistance R4 and resistance the R5 series connection, two pole
The anode of pipe D2 is connected the other end connection at resistance R5 ends with resistance R4；The other end connection at the resistance R5 connections resistance R4 ends
The anode of diode D4, the cathode of the diode D4 are connected with the cathode of diode D3；The anode of the electrolytic capacitor C3 connects
It is connected on the circuit that diode D1 is connected with diode D2, its minus earth；Described resistance R8 one end is connected to electrolytic capacitor C3
On the circuit being connected with diode D1；The anode of the electrolytic capacitor C4 is connected to the circuit that diode D3 is connected with diode D4
On, its minus earth；Described resistance R7 one end is connected on the circuit that electrolytic capacitor C4 is connected with diode D3；Resistance R6 one end
It is connected on the circuit that resistance R4 is connected with resistance R5, the cathode of its other end and DC power supply V2, its anode ground connection；The electricity
The anode of solution capacitance C6 is connected on the circuit that diode D2 is connected with resistance R4, the anode of its anode connection DC power supply V2；
The anode of the electrolytic capacitor C5 is connected on the circuit that diode D4 is connected with resistance R5, its anode connection DC power supply V2's
Anode.
A kind of 2. relatively low power amplifier of loss according to claim 1, it is characterised in that the topping power amplification
Device includes resistance R1, resistance R2, resistance Rg1, resistance Rg2, electrolytic capacitor C1, amplifier U1, amplifier U2 and amplifier U3, institute
Stating amplifier U2 uses INA121, the amplifier U3 to use INA128, the 1 pin connection resistance R1 of the amplifier U2, institute
State resistance R1 to connect with resistance R2, the resistance R2 is connected with 8 pins of amplifier U2；Described resistance Rg1 one end is connected to electricity
On the circuit that resistance R1 is connected with amplifier U2, its other end is connected with the anode of electrolytic capacitor C1, and the electrolytic capacitor C1 is just
Pole is connected on the circuit that resistance R2 is connected with amplifier U2；The positive input of the amplifier U1 is connected to resistance R1 and electricity
On the circuit for hindering R2 connections；5 pins of amplifier U2 are connected with 2 pins of amplifier U3, and 6 pins of the amplifier U2 are with putting
The 3 pins connection of big device U3, the resistance Rg2 are connected between the pin of amplifier U3 and 8 pins.
3. the relatively low power amplifier of a kind of loss according to claim 1, it is characterised in that the driving stage power is put
Big device uses RA07H4047M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721390074.6U CN207304495U (en) | 2017-10-26 | 2017-10-26 | It is a kind of that relatively low power amplifier is lost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721390074.6U CN207304495U (en) | 2017-10-26 | 2017-10-26 | It is a kind of that relatively low power amplifier is lost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304495U true CN207304495U (en) | 2018-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721390074.6U Expired - Fee Related CN207304495U (en) | 2017-10-26 | 2017-10-26 | It is a kind of that relatively low power amplifier is lost |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207304495U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824407A (en) * | 2021-11-23 | 2021-12-21 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| WO2023093835A1 (en) * | 2021-11-25 | 2023-06-01 | 广州慧智微电子股份有限公司 | Circuit and method for protecting amplifier |
-
2017
- 2017-10-26 CN CN201721390074.6U patent/CN207304495U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824407A (en) * | 2021-11-23 | 2021-12-21 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| CN113824407B (en) * | 2021-11-23 | 2022-02-15 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| WO2023093835A1 (en) * | 2021-11-25 | 2023-06-01 | 广州慧智微电子股份有限公司 | Circuit and method for protecting amplifier |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 |