CN104579210A - Wire headphone volume control circuit for intelligent mobile phone - Google Patents
Wire headphone volume control circuit for intelligent mobile phone Download PDFInfo
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- CN104579210A CN104579210A CN201510023018.8A CN201510023018A CN104579210A CN 104579210 A CN104579210 A CN 104579210A CN 201510023018 A CN201510023018 A CN 201510023018A CN 104579210 A CN104579210 A CN 104579210A
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Abstract
A wire headphone volume control circuit for an intelligent mobile phone comprises a microphone unit, a volume control unit connected with the microphone unit, a playing unit connected with the volume control unit in parallel, a voltage maintaining unit connected with the volume control unit and an output unit which is connected with the two ends of the voltage maintaining unit in a bridging mode and used for being connected with the mobile phone. When volume control keys are pressed down, a volume control signal of the volume control unit is transmitted to the output unit, and the volume is adjusted after a circuit in the mobile phone recognizes the volume control signal. The wire headphone volume control circuit has the advantage of being capable of being compatible with Apple mobile phones and Samsung mobile phones.
Description
Technical field
The present invention relates to mobile phone earphone field, be specifically related to intelligent mobile phone line control earphone volume control circuit.
Background technology
At present on the high-end intelligent mobile phone market of China, the governance general layout of apple mobile phone and Samsung mobile phone still obviously, although domestic mobile phone is done all one can to catch up, two failures market position be difficult to vibration.Same and apple mobile phone or the supporting band microphone earphone of Samsung mobile phone also mean there is the huge market demand, and part high-end consumers has apple mobile phone and Samsung mobile phone simultaneously.
The sound control part specific works principle contrast of above two kinds of brand band microphone earphone is as follows:
Fig. 1 is the line control earphone volume control circuit figure of apple mobile phone, its operation principle is: when i Pod plug inserts apple mobile phone earphone jack, when user presses volume increment key KEY V+ or volume minimizing button KEY V-, the sound control chip of described apple mobile phone line control earphone volume control circuit will send one section of pulse signal by signal madulation pin FSK, being loaded on headset plug positive pole MIC+ through resistance R2 and electric capacity C1 is sent in apple mobile phone, adjusts after the identification of apple mobile phone to volume.
Fig. 2 is the line control earphone volume control circuit figure of Samsung mobile phone, its operation principle is: when Samsung headset plug inserts Samsung mobile phone earphone jack, when user presses volume increment key V+, now volume increment key V+ button short circuit, due to the dividing potential drop effect of resistance R2, therefore the voltage of audio pickup end MIC+ reduces, the level signal produced is low to moderate 0.21V and remains on 0.21V, send Samsung mobile phone internal circuit to through audio pickup end MIC+, Samsung mobile phone internal circuit adjusts volume after this level signal identification.And when user presses volume minimizing button V-, now volume reduces the short circuit of button V-button, due to the dividing potential drop effect of resistance R2, resistance R3, therefore the voltage of audio pickup end MIC+ reduces, the level signal produced is low to moderate 0.5V and remains on 0.5V, send Samsung mobile phone internal circuit to through audio pickup end MIC+, Samsung mobile phone internal circuit adjusts volume after this level signal identification.
Analyzed by the earphone sound control circuit of above-mentioned two kinds of different brands mobile phones, obviously reflect the band microphone earphone only adaptive apple mobile phone of apple mobile phone in the market, the band microphone earphone only adaptive Samsung mobile phone of Samsung mobile phone, there is the difficult situation of " what The river water does not intrude into the well water ", in the use of earphone, bring huge inconvenience to the consumer having this pair of brand.
Summary of the invention
The present invention compensate for above-mentioned the deficiencies in the prior art, provides the intelligent mobile phone line control earphone volume control circuit of a kind of compatible apple and Samsung mobile phone.Main thought is the feature integrating apple and Samsung mobile phone band microphone earphone circuit, makes this circuit can compatible apple mobile phone and Samsung mobile phone.
For achieving the above object, present invention employs following technical proposal:
A kind of intelligent mobile phone line control earphone volume control circuit, comprise microphone unit, the volume control unit be connected with microphone unit, with the playing control unit of volume control unit output parallel connection, the voltage holding unit of power supply is provided for volume control unit, the input-output unit for being connected mobile phone that output is connected across voltage holding unit input.
Above-mentioned volume control unit comprises: connect the sound control chip of microphone unit, to increase volume increment key (KEY V+) that input pin (V+) is connected with sound control chip volume, reduce the volume that input pin (V-) is connected reduce button (KEY V-) with sound control chip volume.
The volume of above-mentioned sound control chip increases input pin (V+) and drags down the audio pickup end (MIC+) of expanding channels to input-output unit by low level; The volume of sound control chip reduces input pin (V-) and drags down the audio pickup end (MIC+) of expanding channels to input-output unit by high level; The signal madulation pin (FSK) of sound control chip is connected to the audio pickup end (MIC+) of input-output unit by signal transmission passage.
The supply pin (VDD) of above-mentioned sound control chip keeps holding with the voltage of voltage holding unit and is connected.
Above-mentioned signal transmission passage is electric capacity (C1), and under the state pressing volume increment key (KEY V+), sound control chip will produce one section of volume by signal madulation pin (FSK) increases pulse signal; The audio pickup end (MIC+) of input-output unit is coupled to through electric capacity (C1), under the state pressing volume minimizing button (KEYV-), sound control chip will produce one section of volume by signal madulation pin (FSK) and reduce pulse signal, is coupled to the audio pickup end (MIC+) of input-output unit through electric capacity (C1).
It is resistance (R7) that above-mentioned low level drags down passage, under the state pressing volume increment key (KEY V+), volume increment key (KEY V+) button short circuit, due to the dividing potential drop effect of resistance (R7), therefore the voltage of audio pickup end (MIC+) reduces, and the level signal of generation is low to moderate 0.21V and keeps.
It is the series circuit that resistance (R6) and clamping diode (D1) form that above-mentioned high level drags down passage, under the state pressing volume minimizing button (KEY V-), volume reduces button (KEY V-) button short circuit, due to the dividing potential drop effect of resistance (R6), therefore the voltage of audio pickup end (MIC+) reduces, and the level signal of generation is low to moderate 0.5V and keeps.
Above-mentioned playing control unit is the broadcasting button (KEY PLAY) that one end is connected with the audio pickup end (MIC+) of input-output unit.
Above-mentioned voltage holding unit comprises: play the electric capacity (C2) of servo action and the switching diode (D2) of negative pole serial capacitance (C2); Tandem node is that voltage keeps end, and the positive pole of switching diode (D2) and the non-series side of electric capacity (C2) are the input two ends of voltage holding unit.
Above-mentioned microphone unit comprises microphone and rc filter circuit; Microphone is connected respectively to the audio pickup end (MIC+) of input-output unit and microphone "on" position switch control rule pin (MIC-BLK) of sound control chip by rc filter circuit.
Above-mentioned input-output unit is four-core headset plug, comprises audio pickup end (MIC+), earth terminal (GND), L channel (L) and R channel (R).
Switching diode (D2) negative electrode connects the supply pin (VDD) of sound control chip, and simultaneously through electric capacity (C2) ground connection, described switching diode (D2) anode connects audio pickup end (MIC+).
Button (KEY V-) ground connection is reduced through volume in one end of dropping resistor (R6), the other end is connected with the negative electrode of clamping diode (D1), and the anode of described clamping diode (D1) is connected to audio pickup end (MIC+).
One end of dropping resistor (R7) is through volume increment key (KEY V+) ground connection, the volume simultaneously connecting sound control chip increases input pin (V+), and the other end of described dropping resistor (R7) is connected to audio pickup end (MIC+).
Volume adjustment is carried out by the pulse signal transmission after the modulation of sound control chip to mobile phone when pressing volume increment key (KEY V+) or volume reduces button (KEY V-); By reducing audio pickup end (MIC+) terminal voltage, volume adjustment is carried out to mobile phone when pressing volume increment key (KEY V+) or volume reduces button (KEY V-).
The volume of above-mentioned sound control chip reduces input pin (V-) and reduces button (KEY V-) ground connection through volume, connect clamping diode (D1) negative electrode through dropping resistor (R6), clamping diode (D1) anode is connected to audio pickup end (MIC+) simultaneously.
Supply pin (VDD) connecting valve diode (D2) negative electrode of above-mentioned sound control chip, simultaneously through electric capacity (C2) ground connection, switching diode (D2) anode connects audio pickup end (MIC+).
Microphone "on" position switch control rule pin (MIC-BLK) of above-mentioned sound control chip, audio pickup end (MIC+) is connected to through resistance R4, the parallel circuits simultaneously formed via microphone (MIC) and electric capacity (C3), then series resistor (R3) is connected to audio pickup end (MIC+).
The volume of above-mentioned sound control chip increases input pin (V+), connects audio pickup end (MIC+) through dropping resistor (R7), simultaneously through volume increment key (KEY V+) ground connection.
The signal madulation pin (FSK) of above-mentioned sound control chip is connected to audio pickup end (MIC+) through electric capacity (C1).
Above-mentioned audio pickup end (MIC+) is through playing button (PLAY) ground connection.
The invention has the beneficial effects as follows:
The line control earphone volume control circuit basis of original Samsung and apple mobile phone is integrated, compatible apple and Samsung mobile phone, decrease the reusing also that i.e. cost increases less of material and mobile phone supports that model increases, applicability is stronger, and more also to allow consumer use more convenient in environmental protection.
Accompanying drawing explanation
Fig. 1 is the line control earphone volume control circuit schematic diagram of apple mobile phone.
Fig. 2 is the line control earphone volume control circuit schematic diagram of Samsung mobile phone.
Fig. 3 is intelligent mobile phone line control earphone volume control circuit schematic diagram of the present invention.
Fig. 4 is the wiring schematic diagram of headset plug of the present invention.
Embodiment
Fig. 3 is the physical circuit figure according to intelligent mobile phone line control earphone volume control circuit of the present invention.
According to Fig. 3, include a sound control chip in the circuit, the volume of described sound control chip reduces input V-pin and reduces button KEY V-ground connection through volume on the one hand, connects the clamping diode D1 negative electrode of audio pickup end MIC+ on the other hand through series resistance R6 jointed anode.The supply pin VDD mono-aspect jointed anode of described sound control chip connects the switching diode D2 negative electrode of audio pickup end MIC+, on the one hand through electric capacity C2 ground connection."on" position switch control rule pin MIC-BLK mono-aspect of the microphone of described sound control chip connects audio pickup end MIC+ through resistance R4, is connected audio pickup end MIC+ on the other hand via the parallel circuits series resistor R3 that microphone MIC and electric capacity C3 form.The volume of described sound control chip increases input pin V+ mono-aspect and connects audio pickup end MIC+, on the other hand through volume increment key KEY V+ ground connection through resistance R7.The grounding leg GND ground connection of described sound control chip.The signal madulation pin FSK of described sound control chip connects audio pickup end MIC+ through electric capacity C1.Described audio pickup end MIC+ is through playing button (PLAY) ground connection.
The operation principle of described a kind of intelligent mobile phone line control earphone volume control circuit control circuit is: when headset plug inserts apple mobile phone earphone jack, the voltage of headset plug positive pole MIC+ can be applied to the supply pin VDD of described sound control chip by switching diode D2, voltage is kept getting up by electric capacity C2 simultaneously.When volume increment key KEY V+ or volume reduce button KEY V-be pressed time, after the voltage of audio pickup end MIC+ is lowered, at this moment switching diode D2 ends, and the supply pin vdd voltage of sound control chip remains on normal operating value by electric capacity C2.Described sound control chip reads button and judges it is after volume increment key KEYV+ or volume minimizing button KEY V-are pressed, one section of pulse signal will be sent by signal madulation pin FSK, being loaded on audio pickup end MIC+ through electric capacity C1 is sent in apple mobile phone, adjusts after the identification of apple mobile phone to volume.
When headset plug inserts Samsung mobile phone earphone jack, user presses volume increment key KEY V+, now the short circuit of volume increment key KEY V+ button, due to the dividing potential drop effect of resistance R7, therefore the voltage of audio pickup end MIC+ reduces, and the level signal of generation is low to moderate 0.21V and keeps; Send Samsung mobile phone internal circuit to through audio pickup end MIC+, Samsung mobile phone internal circuit adjusts volume after this level signal identification.And when user presses volume minimizing button KEY V-, now volume reduces the short circuit of button KEYV-button, due to the dividing potential drop effect of resistance R6, therefore the voltage of audio pickup end MIC+ reduces, the level signal produced is low to moderate 0.5V and keeps, send Samsung mobile phone internal circuit to through audio pickup end MIC+, Samsung mobile phone internal circuit adjusts volume after this level signal identification.And now sound control chip also can normally work, but do not affect Samsung mobile phone internal circuit normally to adjust volume, thus reach the object that apple mobile phone and Samsung mobile phone can be controlled, the complete compatible apple mobile phone of described intelligent mobile phone line control earphone volume control circuit control circuit, Samsung mobile phone.
Fig. 4 is the schematic diagram of headset plug: be arranged in order from ferrule to earphone cord direction (to right to left): headset left channel L, earphone R channel, earth terminal GND, audio pickup end MIC+.
Claims (9)
1. an intelligent mobile phone line control earphone volume control circuit, is characterized in that: comprise microphone unit, the volume control unit be connected with microphone unit, with the playing control unit of volume control unit output parallel connection, the voltage holding unit of power supply is provided for volume control unit, the input-output unit for being connected mobile phone that output is connected across voltage holding unit input;
Described volume control unit comprises: connect the sound control chip of microphone unit, to increase volume increment key (KEYV+) that input pin (V+) is connected with sound control chip volume, reduce the volume that input pin (V-) is connected reduce button (KEYV-) with sound control chip volume;
The signal madulation pin (FSK) of described sound control chip is connected to the audio pickup end (MIC+) of input-output unit by signal transmission passage; The volume of described sound control chip increases input pin (V+) and drags down the audio pickup end (MIC+) of expanding channels to input-output unit by low level; The volume of described sound control chip reduces input pin (V-) and drags down the audio pickup end (MIC+) of expanding channels to input-output unit by high level;
The supply pin (VDD) of described sound control chip keeps holding with the voltage of voltage holding unit and is connected.
2. line control earphone volume control circuit according to claim 1, it is characterized in that: described signal transmission passage is high frequency capacitance (C1), under volume increment key (KEYV+) on-state, the volume that sound control chip sends increases pulse signal by signal madulation pin (FSK), is coupled to the audio pickup end (MIC+) of input-output unit through high frequency capacitance (C1); Under volume reduces button (KEYV-) on-state, the volume that sound control chip sends reduces pulse signal by signal madulation pin (FSK), is coupled to the audio pickup end (MIC+) of input-output unit through high frequency capacitance (C1).
3. line control earphone volume control circuit according to claim 1, it is characterized in that: it is low-level resistance (R7) that described low level drags down passage, under volume increment key (KEYV+) on-state, the level signal of audio pickup end (MIC+) is pulled low to 0.21V by low-level resistance (R7).
4. line control earphone volume control circuit according to claim 1, it is characterized in that: it is the series circuit that high level resistance (R6) and clamping diode (D1) form that described high level drags down passage, under volume reduces button (KEY V-) on-state, the level signal of audio pickup end (MIC+) is pulled low to 0.5V by high level resistance (R6) and clamping diode (D1).
5. line control earphone volume control circuit according to claim 1, is characterized in that: described voltage holding unit comprises: the switching diode (D2) of holding capacitor (C2) and negative pole serial connection holding capacitor (C2); Tandem node is that voltage keeps end, the positive pole of switching diode (D2) and the non-series side of holding capacitor (C2) are the voltage input end of voltage holding unit, under switching diode (D2) cut-off state, holding capacitor (C2) continues as sound control chip and provides normal working voltage.
6. line control earphone volume control circuit according to claim 1, is characterized in that: described microphone unit comprises microphone and rc filter circuit; Microphone is connected respectively to the audio pickup end (MIC+) of input-output unit and the microphone control pin (MIC-BLK) of sound control chip by rc filter circuit.
7. line control earphone volume control circuit according to claim 1, it is characterized in that: described input-output unit is four-core headset plug, comprise audio pickup end (MIC+), earth terminal (GND), L channel (L) and R channel (R).
8. line control earphone volume control circuit according to claim 1, is characterized in that:
Switching diode (D2) negative electrode connects the supply pin (VDD) of sound control chip, and simultaneously through electric capacity (C2) ground connection, described switching diode (D2) anode connects audio pickup end (MIC+);
Button (KEYV-) ground connection is reduced through volume in one end of dropping resistor (R6), the other end is connected with the negative electrode of clamping diode (D1), and the anode of described clamping diode (D1) is connected to audio pickup end (MIC+);
One end of dropping resistor (R7) is through volume increment key (KEYV+) ground connection, the volume simultaneously connecting sound control chip increases input pin (V+), and the other end of described dropping resistor (R7) is connected to audio pickup end (MIC+);
Volume adjustment is carried out by the pulse signal transmission after the modulation of sound control chip to mobile phone when pressing volume increment key (KEYV+) or volume reduces button (KEYV-); By reducing audio pickup end (MIC+) terminal voltage, volume adjustment is carried out to mobile phone when pressing volume increment key (KEYV+) or volume reduces button (KEY V-).
9. line control earphone volume control circuit according to claim 1, it is characterized in that: the volume of described sound control chip reduces input pin (V-) and reduces button (KEYV-) ground connection through volume, connect clamping diode (D1) negative electrode through dropping resistor (R6), described clamping diode (D1) anode is connected to audio pickup end (MIC+) simultaneously;
Supply pin (VDD) connecting valve diode (D2) negative electrode of described sound control chip, simultaneously through electric capacity (C2) ground connection, described switching diode (D2) anode connects audio pickup end (MIC+);
Microphone "on" position switch control rule pin (MIC-BLK) of described sound control chip, audio pickup end (MIC+) is connected to through resistance R4, the parallel circuits simultaneously formed via microphone (MIC) and electric capacity (C3), then series resistor (R3) is connected to audio pickup end (MIC+);
The volume of described sound control chip increases input pin (V+), connects audio pickup end (MIC+) through dropping resistor (R7), simultaneously through volume increment key (KEYV+) ground connection;
The signal madulation pin (FSK) of described sound control chip is connected to audio pickup end (MIC+) through electric capacity (C1);
Described audio pickup end (MIC+) is through playing button (PLAY) ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510023018.8A CN104579210A (en) | 2015-01-16 | 2015-01-16 | Wire headphone volume control circuit for intelligent mobile phone |
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| CN201510023018.8A CN104579210A (en) | 2015-01-16 | 2015-01-16 | Wire headphone volume control circuit for intelligent mobile phone |
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| CN201510023018.8A Pending CN104579210A (en) | 2015-01-16 | 2015-01-16 | Wire headphone volume control circuit for intelligent mobile phone |
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| CN105161122A (en) * | 2015-09-23 | 2015-12-16 | 敲敲科技（北京）有限公司 | Earphone-based data processing method and device |
| CN105451135A (en) * | 2015-12-18 | 2016-03-30 | 中名(东莞)电子有限公司 | Three-key earphone control box optimization circuit capable of switching android or apple system |
| CN107343234A (en) * | 2016-05-03 | 2017-11-10 | 峰范（北京）科技有限公司 | Intelligent earphone |
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Application publication date: 20150429 |
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