CN201131052Y - Circuit for automatically controlling output of external speaker - Google Patents
Circuit for automatically controlling output of external speaker Download PDFInfo
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- CN201131052Y CN201131052Y CNU2007201713444U CN200720171344U CN201131052Y CN 201131052 Y CN201131052 Y CN 201131052Y CN U2007201713444 U CNU2007201713444 U CN U2007201713444U CN 200720171344 U CN200720171344 U CN 200720171344U CN 201131052 Y CN201131052 Y CN 201131052Y
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- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 230000005236 sound signal Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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Abstract
The utility model discloses a circuit used for automatically controlling the output of an external loudspeaker, which is characterized in that the circuit comprises an earphone module (1) and a loudspeaker module (2) and the earphone module is connected with the loudspeaker module; the earphone module comprises an earphone drive chip (IC1), an earphone socket (XS3), a first current limiting resistor (R1) and a second current limiting resistor (R2); a left track output end and a right track output end of the earphone drive chip are respectively connected with a left track earphone output end and a right track earphone output end (the third foot and the second foot) of the earphone plug via the first current limiting resistor and the second current limiting resistor; the loudspeaker module comprises a loudspeaker drive module (A) and a mute control module (B), the mute control module and the loudspeaker drive module are inter-connected. The circuit used for automatically controlling the output of an external loudspeaker has the advantages that the circuit controls the operation state of the power amplifier via the switching property of the hardware of the earphone socket and thus controls the output of the external loudspeaker; the circuit has the advantages of low power consumption, energy-saving and environmental friendliness.
Description
[technical field]
The utility model relates to TV domain, relates in particular to a kind of circuit of automatic control external speaker output.
[background technology]
Usually the earphone socket of television set all has left and right acoustic channels and hardware switch thereof, inserts earphone socket by tone frequency channel wire and flicks switch to reach the effect of control loudspeaker output.General designing requirement is for when inserting the earpiece audio output line, external speaker (as the loudspeaker of television set) will stop sounding and keep quiet (Mute) state, as shown in Figure 1, the audio signal that power amplifier IC0 output is amplified is through the 4th of earphone socket XS3,5 pin and the 7th, 8 pin are delivered to left channel loudspeaker XS1 and right channel loudspeaker XS2 to reach the effect of loud speaker output, after inserting the earpiece audio line, the 4th of XS3,5 pin and the 7th, 8 pin are disconnected respectively turning off loud speaker output, above-mentioned audio signal through the first current-limiting resistance R1 and the second current-limiting resistance R2 current limliting after only by the 2nd of XS3,3 pin export earphone to.The not enough environmental protection and energy saving of this design; because the audio signal that loud speaker and earphone use same power amplifier to send; when using earphone output; the required power of earphone itself is very little; the audio signal of power amplifier IC0 output exports earphone again to after by R1, R2 current limliting and is not burnt out by excessive signal with the protection earphone; but the power amplifier IC0 output audio signal amplitude still amplitude when using external speaker is identical; this moment, the power of power amplifier IC0 was constant substantially, and such design relatively takes the not enough environmental protection of electricity.
[summary of the invention]
Thereby the utility model provides a kind of hardware switch characteristic of earphone socket of utilizing to come the operating state control external speaker of control power amplifiers to export, and the circuit of the automatic control external speaker output of little, the energy-conservation environmental protection again of power consumption.
In order to solve above technical problem, the utility model provides, and a kind of circuit of automatic control external speaker output comprises earphone module 1 and loudspeaker module 2, and described earphone module connects with loudspeaker module.Described earphone module comprises earphone chip for driving IC1, earphone socket XS3, the first current-limiting resistance R1 and the second current-limiting resistance R2; The left and right sound channels output of described earphone chip for driving is connected to the left and right sound channels earphone output (the 3rd pin and the 2nd pin) of earphone socket respectively by first current-limiting resistance and second current-limiting resistance; Described loudspeaker module comprises speaker drive modules A and quiet control module B, and described quiet control module is connected with the speaker drive module; Described speaker drive module comprises power amplifier IC2, left channel loudspeaker XS1 and right channel loudspeaker XS2; Described power amplifier comprises left and right sound channels input/go out end and quiet control end MUTE_PA, the left and right sound channels output of described power amplifier is connected respectively to the first input end of left and right sound channels loud speaker, and second input of described left and right sound channels loud speaker is ground connection respectively; Described quiet control module comprises the 3rd current-limiting resistance R8, the 4th current-limiting resistance R9, the 5th current-limiting resistance R11, the first divider resistance R10, the second divider resistance R12, the first switching tube V1, second switch pipe V2 and the 3rd switching tube V3; Described the 3rd current-limiting resistance is connected between the I/O mouth MUTE end and first control end of switching tube of master chip; First output of described first switching tube connects with first output of second switch pipe, and is connected to the 3rd control end of switching tube, second output head grounding by the 5th current-limiting resistance; Described the 4th current-limiting resistance is connected between the control end of DC power supply VCC and second switch pipe; Described first divider resistance is connected between first output and DC power supply of second switch pipe; Second output head grounding of described second switch pipe; Described second divider resistance is connected between first output and DC power supply of the 3rd switching tube; Second output head grounding of described the 3rd switching tube; The 5/7th pin of described earphone socket is connected to the control end of described second switch pipe; The quiet control end of described power amplifier is connected to second output of the 3rd switching tube.
The circuit of above-described a kind of automatic control external speaker output, the 1st pin ground connection of described earphone socket, the 4th pin and the 8th pin connect external speaker.
The circuit of above-described a kind of automatic control external speaker output, described switching tube is triode preferably, wherein control end of switching tube is the base stage of triode, and first output of switching tube is the collector electrode of triode, and second output of switching tube is the emitter of triode.
The circuit of above-described a kind of automatic control external speaker output, the model of described earphone chip for driving is TDA1308 preferably.
The circuit of above-described a kind of automatic control external speaker output, the model of described power amplifier is TDA8944 preferably.
The circuit of a kind of automatic control external speaker output of the utility model, earphone realizes that by simple earphone chip for driving power amplification gets final product, and realizes earphone output by 2,3 bipods of earphone socket; External speaker is realized power amplification output by power amplifier; Power amplifier is an operating state when the quiet control end MUTE_PA foot control system voltage of power amplifier is low level, and power amplifier is quiet MUTE state during high level; When earphone cord did not insert earphone socket, the continuous voltage of earphone socket the 7th, 8 bipods was 0V, so the base stage A of second switch pipe is a low level, V2 ends, and the base stage B of the 3rd switching tube is a high level, the V3 conducting, MUTE_PA is a low level, and power amplifier IC2 is in running order; When earphone cord inserted earphone socket, earphone 7,8 bipods disconnected, A place high level so, and the V2 conducting, B place low level, V3 ends, and MUTE_PA is a high level, is in the MUTE mute state at this moment, and power consumption is very low at this moment for power amplifier IC2, plays energy-conservation effect.
The circuit that the utility model is controlled external speaker output automatically utilizes the hardware switch characteristic of earphone socket to come the operating state of control power amplifiers, make the power amplifier that when earphone is exported, drives loud speaker be in mute state, this moment, the power consumption of power amplifier was very little, can play the effect of energy-conserving and environment-protective.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the circuit diagram of prior art.
Fig. 2 is the circuit diagram of the circuit embodiments 1 of a kind of automatic control external speaker output of the utility model.
[embodiment]
In the circuit embodiments 1 of a kind of automatic control external speaker output of the utility model shown in Figure 1, comprise earphone socket XS3, earphone chip for driving IC1, power amplifier IC2, the first current-limiting resistance R1, second ration the power supply resistance R2, the 3rd current-limiting resistance R8, the 4th current-limiting resistance R9, the 5th current-limiting resistance R11, the first divider resistance R10, the second divider resistance R12, the first triode V1, the second triode V2, the 3rd triode V3, left channel loudspeaker XS1 and right channel loudspeaker (XS2).
In the present embodiment, the L channel output of described earphone chip for driving IC1 is connected to the 3rd pin of described earphone socket XS3 by the first current-limiting resistance R1, and the R channel output is connected to the 2nd pin of described earphone socket XS3 by the second current-limiting resistance R2; The 5th pin of described earphone socket (or the 7th pin is connected to the base stage of second triode, the 1st pin ground connection, and the 4th pin and the 8th pin connect external speaker; The first input end of the first input end of described left channel loudspeaker XS1 and right channel loudspeaker XS2 is the left and right sound channels output of power amplifier respectively, and second input is ground connection respectively; Described the 3rd current-limiting resistance R8 is connected between the base stage of the I/O mouth MUTE end of master chip and the first triode V1; The collector electrode of described first triode is connected to the collector electrode of second triode, grounded emitter; Described the 4th current-limiting resistance R9 is connected between the base stage and DC power supply VCC of second triode; The described first divider resistance R10 is connected between the collector electrode and DC power supply of second triode; The grounded emitter of described second triode; Described the 5th current limliting R11 is connected between the base stage of the collector electrode of second switch pipe and the 3rd switching tube; The collector electrode of described the 3rd switching tube is connected to DC power supply VCC, grounded emitter by the second divider resistance R12; The quiet control end of described power amplifier is connected to the collector electrode of the 3rd switching tube.
In the present embodiment, the model of described earphone chip for driving is TDA1308, and the model of described power amplifier is TDA8944.
In the present embodiment, earphone is realized power amplification by the earphone chip for driving, and realizes earphone output by 2,3 bipods of earphone socket; External speaker is realized power amplification output by power amplifier; Power amplifier is an operating state when the quiet control end MUTE_PA control voltage of power amplifier is low level, and power amplifier is quiet MUTE state during high level; When earphone cord did not insert earphone socket, the continuous voltage of earphone socket the 7th, 8 bipods was 0V, so the base stage A of second switch pipe is a low level, V2 ends, and the base stage B of the 3rd switching tube is a high level, the V3 conducting, MUTE_PA is a low level, and power discharging IC 2 is in running order; When earphone cord inserts earphone socket, disconnect between earphone socket the 7th, 8 bipods, A place high level so, the V2 conducting, B place low level, V3 ends, MUTE_PA is a high level, power amplifier IC2 is in the MUTE mute state at this moment, and power amplifier IC2 power consumption this moment is very low, plays energy-conservation effect.
Present embodiment utilizes the hardware switch characteristic of earphone socket to come the operating state of control power amplifiers, make the power amplifier that when earphone is exported, drives loud speaker be in mute state, this moment, the power consumption of power amplifier was very little, can play the effect of energy-conserving and environment-protective.
Claims (5)
1. a circuit of controlling external speaker output automatically is characterized in that comprise earphone module (1) and loudspeaker module (2), described earphone module connects with loudspeaker module;
Described earphone module comprises earphone chip for driving (IC1), earphone socket (XS3), first current-limiting resistance (R1) and second current-limiting resistance (R2); The left and right sound channels output of described earphone chip for driving is connected to the left and right sound channels earphone output (the 3rd pin and the 2nd pin) of earphone socket respectively by first current-limiting resistance and second current-limiting resistance;
Described loudspeaker module comprises speaker drive module (A) and quiet control module (B), and described quiet control module is connected with the speaker drive module;
Described speaker drive module comprises power amplifier (IC2), left channel loudspeaker (XS1) and right channel loudspeaker (XS2); Described power amplifier comprises left and right sound channels input/go out end and quiet control end (MUTE_PA), the left and right sound channels output of described power amplifier is connected respectively to the first input end of left and right sound channels loud speaker, and second input of described left and right sound channels loud speaker is ground connection respectively;
Described quiet control module comprises the 3rd current-limiting resistance (R8), the 4th current-limiting resistance (R9), the 5th current-limiting resistance (R11), first divider resistance (R10), second divider resistance (R12), first switching tube (V1), second switch pipe (V2) and the 3rd switching tube (V3); Described the 3rd current-limiting resistance is connected between the I/O mouth MUTE end and first control end of switching tube of master chip; First output of described first switching tube connects with first output of second switch pipe, and is connected to the 3rd control end of switching tube, second output head grounding by the 5th current-limiting resistance; Described the 4th current-limiting resistance is connected between the control end of DC power supply (VCC) and second switch pipe; Described first divider resistance is connected between first output and DC power supply of second switch pipe; Second output head grounding of described second switch pipe; Described second divider resistance is connected between first output and DC power supply of the 3rd switching tube; Second output head grounding of described the 3rd switching tube;
The 5/7th pin of described earphone socket is connected to the control end of described second switch pipe;
The quiet control end of described power amplifier is connected to second output of the 3rd switching tube.
2. the circuit of automatic control external speaker output according to claim 1 is characterized in that, the 1st pin ground connection of described earphone socket, and the 4th pin and the 8th pin connect external speaker.
3. the circuit of automatic control external speaker output according to claim 1, it is characterized in that, described switching tube is a triode, wherein control end of switching tube is the base stage of triode, first output of switching tube is the collector electrode of triode, and second output of switching tube is the emitter of triode.
4. the circuit of automatic control external speaker output according to claim 1 is characterized in that the model of described earphone chip for driving is TDA1308.
5. the circuit of automatic control external speaker output according to claim 1 is characterized in that the model of described power amplifier is TDA8944.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201713444U CN201131052Y (en) | 2007-12-05 | 2007-12-05 | Circuit for automatically controlling output of external speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201713444U CN201131052Y (en) | 2007-12-05 | 2007-12-05 | Circuit for automatically controlling output of external speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201131052Y true CN201131052Y (en) | 2008-10-08 |
Family
ID=40018921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201713444U Expired - Fee Related CN201131052Y (en) | 2007-12-05 | 2007-12-05 | Circuit for automatically controlling output of external speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201131052Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067601A (en) * | 2013-01-15 | 2013-04-24 | Tcl通讯（宁波）有限公司 | Mobile terminal and detecting method of earphone inserting state thereof |
| CN106162408A (en) * | 2016-08-12 | 2016-11-23 | 歌尔股份有限公司 | A kind of earphone |
| CN106998520A (en) * | 2016-01-22 | 2017-08-01 | 深圳富泰宏精密工业有限公司 | Loudspeaker assembly and the portable electron device with the loudspeaker assembly |
-
2007
- 2007-12-05 CN CNU2007201713444U patent/CN201131052Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067601A (en) * | 2013-01-15 | 2013-04-24 | Tcl通讯（宁波）有限公司 | Mobile terminal and detecting method of earphone inserting state thereof |
| CN103067601B (en) * | 2013-01-15 | 2015-02-11 | Tcl通讯（宁波）有限公司 | Mobile terminal and detecting method of earphone inserting state thereof |
| CN106998520A (en) * | 2016-01-22 | 2017-08-01 | 深圳富泰宏精密工业有限公司 | Loudspeaker assembly and the portable electron device with the loudspeaker assembly |
| CN106998520B (en) * | 2016-01-22 | 2020-04-03 | 深圳富泰宏精密工业有限公司 | Speaker assembly and portable electronic device having the same |
| CN106162408A (en) * | 2016-08-12 | 2016-11-23 | 歌尔股份有限公司 | A kind of earphone |
| CN106162408B (en) * | 2016-08-12 | 2019-08-16 | 歌尔股份有限公司 | A kind of earphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Boluo Konka Exactitude Science Technology Co., Ltd. Assignor: Konka Group Co., Ltd. Contract record no.: 2010440001121 Denomination of utility model: Circuit for automatically controlling output of external speaker Granted publication date: 20081008 License type: Exclusive License Record date: 20100812 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20121205 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Boluo Konka Exactitude Science Technology Co., Ltd. Assignor: Konka Group Co., Ltd. Contract record no.: 2010440001121 Denomination of utility model: Circuit for automatically controlling output of external speaker Granted publication date: 20081008 License type: Exclusive License Record date: 20100812 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |