CN203084154U - Test device of terminal audio interface circuit - Google Patents
Test device of terminal audio interface circuit Download PDFInfo
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- CN203084154U CN203084154U CN 201220678226 CN201220678226U CN203084154U CN 203084154 U CN203084154 U CN 203084154U CN 201220678226 CN201220678226 CN 201220678226 CN 201220678226 U CN201220678226 U CN 201220678226U CN 203084154 U CN203084154 U CN 203084154U
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Abstract
The utility model discloses a test device of a terminal audio interface circuit, which can be used to improve a test efficiency of an audio signal output by the terminal audio interface circuit and reduce the test complexity. The test device comprises an audio interface connection circuit, a power amplification circuit, and a sound signal playing circuit. The audio interface connection circuit is connected with the terminal audio interface circuit, and the terminal can output the audio signal by the audio interface circuit. An output end of the audio interface connection circuit is connected with an input end of the power amplification circuit, and the power amplification circuit can be used for the power amplification of the audio signal output by the audio interface connection circuit. An output end of the power amplification circuit is connected with the sound signal playing circuit, and the sound signal playing circuit can be used to convert the audio signal amplified by the power amplification circuit into the sound signal, and then play the sound signal.
Description
Technical field
The utility model relates to the terminal test technical field, relates in particular to a kind of proving installation of terminal audio frequency interface circuit.
Background technology
Along with the diversified development of end product, occurred can output audio signal end product, and wired earphone also becomes the audio output device of a large amount of multimedia terminal products gradually.The audio output device of wired earphone when adopting telecom terminal product to converse for example, wired earphone are as the multimedia audio output device of multimedia terminal product etc.
In the end product generative process or produce finish after, need test the audio interface circuit of end product.In the prior art, as shown in Figure 1, when the sound that the audio interface circuit (especially to the audio interface circuit of needs by the earphone output sound) of end product is exported is tested, the tester need wear earphone to monitor the sound of audio interface circuit output, and earphone is easy to come off from tester's ear in the test process.And, sometimes need sound that an ear monitors output (for example in order to reach test measure of merit personnel, audio interface circuit for two-channel, two headset earpiece of earphone are distinguished the voice output of corresponding L channel and R channel), this just needs continuous of taking off in two headset earpiece from ear, for test is made troubles.
Wherein, for end product is the mainboard assembly state, the tester need wear two cover earphones, wherein one overlaps the sound of the earphone interface circuit output in the product of test terminal, the sound of the receiver interface circuit of another set of test terminal product output (since the voice signal of receiver interface circuit output a little less than, can't adopt powerful loudspeaker, need to adopt earphone to export).This two covers earphone adds up to the use of four headset earpiece, cause the tester between these four headset earpiece, to switch, and the tester also will remember every cover earphone corresponding audio interface circuit (earphone interface circuit or receiver interface circuit), this has just improved tester's labour intensity, the tester need frequently take off or wear earphone, has increased the work complexity, in case and the tester forget and wear earphone, to cause the ear-phone function test leakage, cause hidden danger of quality.Simultaneously, the headset earpiece volume is less, needs the tester carefully to listen to sound, has aggravated tester's hearing fatigue, causes impaired hearing.
The utility model content
The utility model provides a kind of proving installation of terminal audio frequency interface circuit, in order to improve the testing efficiency of the sound signal that the audio interface circuit of terminal is exported, reduces the testing complex degree.
The concrete technical scheme that the utility model embodiment provides is as follows:
A kind of proving installation of terminal audio frequency interface circuit comprises audio interface connecting circuit, power amplification circuit and voice signal playing circuit, wherein,
Described audio interface connecting circuit connecting terminal audio interface circuit is with the audio signal output of described terminal via audio interface circuit;
The output terminal of described audio interface connecting circuit connects the input end of described power amplification circuit, by described power amplification circuit the described sound signal of institute's audio interface connecting circuit output is carried out power amplification;
The output terminal of described power amplification circuit connects described voice signal playing circuit, and the sound signal after by described voice signal playing circuit described power amplification circuit being amplified is converted to voice signal and plays.
Based on technique scheme, among the utility model embodiment, after drawing the sound signal of terminal by the audio interface connecting circuit via audio interface circuit, this sound signal is carried out power amplification, again the sound signal after the power amplification being converted to sound by the voice signal playing circuit plays, the tester tests with the audio interface circuit to terminal by monitoring the sound of playing, the tester tests the complicated operation that brings by the headset earpiece of wearing earphone to terminal in the prior art via the sound signal of audio interface circuit thereby solved, the problem of inefficiency has reduced tester's complicated operation degree.
Description of drawings
The synoptic diagram of Fig. 1 in the prior art audio interface circuit of terminal being tested;
Fig. 2 is a proving installation structural representation among the utility model embodiment;
Fig. 3 is for comprising the proving installation structural representation of test button among the utility model embodiment;
Fig. 4 is for comprising the proving installation structural representation of on-off element among the utility model embodiment;
Fig. 5 is the proving installation structural representation of corresponding binaural audio signal among the utility model embodiment;
Fig. 6 is another structural representation of the proving installation of corresponding binaural audio signal among the utility model embodiment;
Fig. 7 is the realization principle schematic of wired earphone;
Fig. 8 is the test circuit synoptic diagram of earphone interface circuit among the utility model embodiment;
Fig. 9 is the prime power amplifying circuit synoptic diagram that triode makes up among the utility model embodiment;
Figure 10 is the power amplification circuit synoptic diagram that adopts integrated chip to realize among the utility model embodiment;
The method flow diagram of Figure 11 among the utility model embodiment the audio interface circuit of terminal being tested;
The method flow diagram of Figure 12 among the utility model embodiment earphone interface circuit being tested.
Embodiment
The tester tests the complicated operation that brings, the problem of inefficiency by the headset earpiece of wearing earphone to the audio interface circuit of terminal in the prior art in order to solve, the utility model embodiment provides a kind of proving installation that the terminal audio frequency interface circuit is tested, to improve testing efficiency, reduce the testing complex degree to the audio interface circuit of terminal.
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated.
As shown in Figure 2, provide a kind of proving installation of terminal audio frequency interface circuit among the utility model embodiment, this device mainly comprises audio interface connecting circuit 201, power amplification circuit 202 and voice signal playing circuit 203, wherein,
Audio interface connecting circuit 201 connecting terminal audio interface circuit 204 are with the audio signal output of terminal via audio interface circuit 204;
The output terminal of audio interface connecting circuit 201 connects the input end of power amplification circuit 202, carries out power amplification by the sound signal of 202 pairs of audio interface connecting circuit of power amplification circuit, 201 outputs;
The output terminal of power amplification circuit 202 connects voice signal playing circuit 203, and the sound signal after by voice signal playing circuit 203 power amplification circuit 202 being amplified is converted to voice signal and plays.
Particularly, voice signal playing circuit 203 adopts loudspeakers to realize, plays after promptly by loudspeaker sound signal being converted to voice signal.Wherein, the voice signal playing circuit is not limited in and adopts loudspeaker to realize, in the practical application, as long as after sound signal can being converted to voice signal and broadcast, air-borne transmission also can get final product to tester's ear in the clear identification of tested personnel.
Among the utility model embodiment, the audio interface circuit 204 of terminal can be that earphone interface circuit, receiver interface circuit etc. can be by the interface circuits of earphone output audio signal.
Particularly, as shown in Figure 3, when the audio interface circuit 204 of terminal to be measured is earphone interface circuit, this proving installation also comprises a test button 301, the public ground pin of audio interface connecting circuit 201 connects this test button 301 back ground connection, when terminal detects the trigger pip that test button 301 presses, by the sound signal of audio interface connecting circuit 201 outputs via earphone interface circuit.
In one is preferably realized, as shown in Figure 4, this proving installation also comprises on-off element 401, this on-off element 401 is serially connected with power amplification circuit 202 and voice signal playing circuit 203(such as loudspeaker) be connected branch road, by the on off state guide sound tone signal playing circuit 203(such as the loudspeaker of on-off element 401) play the voice signal after the conversion.Among the utility model embodiment, on-off element can be the switch of arbitrary form, for example push type, knob, push-pull switch or the like.
In the practical application, sound signal via audio interface circuit output in the terminal to be measured can be monophonic audio signal or binaural audio signal, for example, sound signal via earphone interface circuit output in the portable terminal mostly is binaural audio signal greatly, and two headset earpiece of earphone are corresponding left channel audio signal and right channel audio signal respectively.
In a specific implementation, as shown in Figure 5, if the sound signal via audio interface circuit 204 in the terminal to be measured is divided into left channel audio signal and right channel audio signal, correspondingly, power amplification circuit 202 comprises the R channel power amplification circuit 502 that is used to amplify the L channel power amplification circuit 501 of left channel audio signal and is used to amplify right channel audio signal, and voice signal playing circuit 203 comprises the first voice signal playing circuit 503 and second sound signal playing circuit 504.
Wherein, audio interface connecting circuit 201 connects the input end of L channel power amplification circuit 501 by the left channel audio signal output pin that is used to export left channel audio signal, and the output terminal of L channel power amplification circuit 501 connects the input end of the first voice signal playing circuit 503; Audio interface connecting circuit 201 connects the input end of R channel power amplification circuit 502 by the right channel audio signal output pin that is used to export right channel audio signal, and the output terminal of R channel power amplification circuit 502 connects the input end of second sound signal playing circuit 504.
Preferably, if sound signal via audio interface circuit 204 is divided into left channel audio signal and right channel audio signal in the terminal to be measured, as shown in Figure 6, then this proving installation also comprises first on-off element 601 and second switch element 602 in this specific implementation;
Wherein, first on-off element 601 is serially connected with the branch road that is connected of L channel power amplification circuit 501 and the first voice signal playing circuit 503, controls L channel voice signal after the 503 output conversions of the first voice signal playing circuit by the on off state of first on-off element 601;
Preferably, the first voice signal playing circuit 503 and second sound signal playing circuit 504 all adopt loudspeaker to realize in this specific implementation.
In the practical application, audio interface connecting circuit 201 specific implementation principles are identical with the realization principle of the headset plug of wired earphone.Be the realization basic circuit diagram of wired earphone as shown in Figure 7, wherein, the pin 4 of headset plug is the output of public ground pin, pin 1 corresponding left channel audio signal (SPK/L), the 3 corresponding pushbutton switch SW of connection of output, pin and the Mike MIC of pin 2 corresponding right channel audio signals (SPK/R), this pushbutton switch control Mike's output.
Among the utility model embodiment, the audio interface connecting circuit can adopt headset plug to realize, particularly, the pin that is used for output audio signal of headset plug is connected with the output terminal of audio interface circuit, and is connected with the input end of power amplification circuit by lead-in wire; The public ground pin of headset plug is connected with the common of described audio interface circuit, and is connected with the common of power amplification circuit by lead-in wire.
If the sound signal via audio interface circuit is a monophonic audio signal, then the pin that is used for output audio signal of headset plug can be the pin 1 or the pin 2 of headset plug.
If the sound signal via audio interface circuit comprises left channel audio signal and right channel audio signal, first pin that is used to export left channel audio signal (pin 1) of headset plug is connected with the output terminal of the left channel audio signal of audio interface circuit, and is connected with the L channel power amplification circuit that is used to amplify left channel audio signal by lead-in wire;
Second pin that is used to export right channel audio signal (pin 2) of headset plug is connected with the output terminal of the right channel audio signal of described audio interface circuit, and is connected with the R channel power amplification circuit that is used to amplify right channel audio signal by lead-in wire.
For example, earphone interface circuit with terminal to be measured is an example, the audio interface connecting circuit 201 concrete headset plug circuit that adopt are realized, in the test circuit synoptic diagram as shown in Figure 8, after terminal to be measured detects the trigger pip that the test button that is connected with the public ground pin of headset plug presses, export by the headset plug circuit via the binaural audio signal (being generally small-signal) of earphone jack output in the terminal to be measured less than 10 millivolts, wherein, after left channel audio signal and right channel audio signal are imported each self-corresponding power amplification circuit respectively and are carried out power amplification, left channel audio signal after the amplification exports left channel loudspeaker to, and the right channel audio signal after the amplification exports right channel loudspeaker to.
Among the utility model embodiment, power amplification circuit can be to adopt discrete device to realize, also can be to adopt integrated chip to realize, only need satisfy can be used in and voltage is carried out power amplification less than 10 millivolts small-signal get final product.For example power amplification circuit can be the power amplification circuit that adopts triode as shown in Figure 9 to realize as the prime power amplifier, also can be to adopt the amplifying circuit of integrated chip PJ2822M as shown in Figure 10 as main power amplifier, the integrated chip that is used for power amplification in the practical application is not limited in PJ2822M, can also be other the acp chip that can be used as power amplifier (as LM386 etc.).
Based on above-mentioned principle, as shown in Figure 11, the detailed method flow process that the audio interface circuit of terminal is tested is as follows:
Step 1101: by the sound signal of audio interface connecting circuit outlet terminal via audio interface circuit.
Wherein, the audio interface circuit of terminal includes but not limited to that earphone interface circuit, receiver interface circuit or the like can be by the interface circuits of earphone output audio signal.
Preferably, if audio interface circuit is earphone interface circuit, after terminal detects the trigger pip that the test button of audio interface connecting circuit presses, by the sound signal of audio interface connecting circuit outlet terminal via audio interface circuit.
Step 1102: the sound signal of audio interface connecting circuit output is carried out power amplification.
The power amplification circuit that adopts when preferably, carrying out power amplification is for being applicable to the power amplification circuit that amplifies small-signal (being generally less than 10 millivolts signal).
Preferably, be binaural audio signal as if sound signal via audio interface circuit, then when carrying out power amplification, left channel audio signal and right channel audio signal are carried out power amplification respectively.If the sound signal via audio interface circuit is a monophonic audio signal, directly this sound signal is carried out power amplification and get final product.
Step 1103: the sound signal after the power amplification is converted to voice signal and broadcast by the voice signal playing circuit, played sound signal is tested.
Preferably, the sound signal after the power amplification is converted to voice signal by the voice signal playing circuit after, control voice signal after this voice signal playing circuit is play conversion by switch.
Preferably, if terminal is divided into left channel audio signal and right channel audio signal via the sound signal of audio interface circuit, the left channel audio signal of the left channel audio signal output pin outlet terminal by the audio interface connecting circuit, and the right channel audio signal that passes through the right channel audio signal output pin outlet terminal of audio interface connecting circuit, left channel audio signal and right channel audio signal by the output of audio interface connecting circuit are carried out power amplification respectively, left channel audio signal after the power amplification is converted to voice signal and broadcast by the first voice signal playing circuit, and/or, the right channel audio signal after the power amplification is converted to voice signal and broadcast by the second sound signal playing circuit.
Preferably, the left channel audio signal after the power amplification is converted to voice signal by the first voice signal playing circuit, and controls voice signal after the first voice signal playing circuit is play conversion by first switch; And/or, the right channel audio signal after the power amplification is converted to voice signal by the second sound signal playing circuit, and by the voice signal after the second switch control second sound signal playing circuit broadcast conversion.
Preferably, the voice signal playing circuit adopts loudspeaker to realize among the utility model embodiment, be that sound signal after the power amplification is after loudspeaker is converted to voice signal and plays, the sound of playing is transmitted in air in tester's the ear, the audio interface circuit of terminal is tested and assessed according to the sound of hearing by the tester.
For example, with the audio interface circuit is that earphone interface circuit is an example, as shown in Figure 12, after beginning test, whether terminal to be measured detects the test button that is connected with the public ground pin of headset plug and presses, if do not press, then continue to detect,, then play sound by the switch control left channel loudspeaker corresponding with left channel audio signal if press, this sound transmission to tester's ear, by the tester to testing and assessing; The control right channel loudspeaker corresponding with right channel audio signal plays sound then, and this sound transmission is evaluated and tested it by the tester to tester's ear; Whether terminal detects test button and upsprings, if do not upspring, then the tester continues the sound of left channel loudspeaker and/or right channel loudspeaker output is evaluated and tested, if upspring, and finish test procedure then.If audio interface circuit is the receiver interface circuit, then need not to detect test button and whether press or upspring, remaining processing procedure is identical with the testing process of above-mentioned earphone interface circuit.
Based on technique scheme, among the utility model embodiment, after drawing the sound signal of terminal by the audio interface connecting circuit via audio interface circuit, this sound signal is carried out power amplification, again the sound signal after the power amplification being converted to sound by the voice signal playing circuit plays, the tester tests with the audio interface circuit to terminal by monitoring the sound of playing, the tester tests the complicated operation that brings by the headset earpiece of wearing earphone to terminal in the prior art via the sound signal of audio interface circuit thereby solved, the problem of inefficiency has reduced tester's complicated operation degree.
And the tester need not to wear the audio interface circuit that earphone gets final product the test terminal, has simplified testing scheme, has improved the level of checking on the quality simultaneously, and the highly versatile of this testing scheme is convenient to the frock circuit universalization that will test.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1. the proving installation of a terminal audio frequency interface circuit is characterized in that, comprises audio interface connecting circuit, power amplification circuit and voice signal playing circuit, wherein,
Described audio interface connecting circuit connecting terminal audio interface circuit is with the audio signal output of described terminal via audio interface circuit;
The output terminal of described audio interface connecting circuit connects the input end of described power amplification circuit, by described power amplification circuit the described sound signal of institute's audio interface connecting circuit output is carried out power amplification;
The output terminal of described power amplification circuit connects described voice signal playing circuit, and the sound signal after by described voice signal playing circuit described power amplification circuit being amplified is converted to voice signal and plays.
2. device as claimed in claim 1 is characterized in that, described audio interface circuit is earphone interface circuit or receiver interface circuit.
3. device as claimed in claim 2 is characterized in that, if described audio interface circuit is an earphone interface circuit, also comprises: test button;
The public ground pin of described audio interface connecting circuit connects ground connection after the described test button;
When described terminal detects the trigger pip that described test button presses, by the sound signal of described audio interface connecting circuit output via described earphone interface circuit.
4. device as claimed in claim 1, it is characterized in that, also comprise on-off element, be serially connected with the branch road that is connected of described power amplification circuit and described voice signal playing circuit, control voice signal after described voice signal playing circuit is play conversion by the on off state of on-off element.
5. device as claimed in claim 1, it is characterized in that, if the sound signal via described audio interface circuit comprises left channel audio signal and right channel audio signal, described power amplification circuit comprises the R channel power amplification circuit that is used to amplify the L channel power amplification circuit of left channel audio signal and is used to amplify right channel audio signal, and described voice signal playing circuit comprises the first voice signal playing circuit and second sound signal playing circuit;
Described audio interface connecting circuit connects the input end of described L channel power amplification circuit by the left channel audio signal output pin that is used to export left channel audio signal, and the output terminal of described L channel power amplification circuit connects the input end of the described first voice signal playing circuit;
Described audio interface connecting circuit connects the input end of described R channel power amplification circuit by the right channel audio signal output pin that is used to export right channel audio signal, and the output terminal of described R channel power amplification circuit connects the input end of described second sound signal playing circuit.
6. device as claimed in claim 5 is characterized in that, also comprises first on-off element and second switch element;
Described first on-off element is serially connected with the branch road that is connected of described L channel power amplification circuit and the described first voice signal playing circuit, controls L channel voice signal after the described first voice signal playing circuit output conversion by the on off state of first on-off element;
Described second switch element is serially connected with the branch road that is connected of described R channel power amplification circuit and described second sound signal playing circuit, is controlled the right channel sound signal of described second sound signal playing circuit output conversion by the on off state of second switch element.
7. as each described device of claim 1-6, it is characterized in that described audio interface connecting circuit adopts headset plug to realize, is specially:
The pin that is used for output audio signal of headset plug is connected with the output terminal of described audio interface circuit, and is connected with the input end of power amplification circuit by lead-in wire;
The public ground pin of described headset plug is connected with the common of described audio interface circuit, and is connected with the common of power amplification circuit by lead-in wire.
8. device as claimed in claim 7, it is characterized in that, if the sound signal via described audio interface circuit comprises left channel audio signal and right channel audio signal, the pin that is used for output audio signal of headset plug is connected with the output terminal of described audio interface circuit, and by the lead-in wire be connected with the input end of power amplification circuit, be specially:
First pin that being used to of headset plug exported left channel audio signal is connected with the output terminal of the left channel audio signal of described audio interface circuit, and is connected with the L channel power amplification circuit that is used to amplify left channel audio signal by lead-in wire;
Second pin that being used to of headset plug exported right channel audio signal is connected with the output terminal of the right channel audio signal of described audio interface circuit, and is connected with the R channel power amplification circuit that is used to amplify right channel audio signal by lead-in wire.
9. as each described device of claim 1-6, it is characterized in that described voice signal playing circuit adopts loudspeaker to realize.
10. as each described device of claim 1-6, it is characterized in that described power amplification circuit is used for voltage is carried out power amplification less than 10 millivolts small-signal.
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| CN 201220678226 CN203084154U (en) | 2012-12-10 | 2012-12-10 | Test device of terminal audio interface circuit |
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| CN 201220678226 CN203084154U (en) | 2012-12-10 | 2012-12-10 | Test device of terminal audio interface circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686580A (en) * | 2013-12-30 | 2014-03-26 | 福建星网视易信息系统有限公司 | Automatic test method and device for multi-path audio output interface |
| CN106154096A (en) * | 2015-04-27 | 2016-11-23 | 中兴通讯股份有限公司 | Audio connecting cord detection method and device |
| CN108064347A (en) * | 2017-11-28 | 2018-05-22 | 福建联迪商用设备有限公司 | The audio pin test method and test device of communication module |
| CN111698630A (en) * | 2019-12-02 | 2020-09-22 | 芯讯通无线科技（上海）有限公司 | Test system of audio interface of wireless communication module |
-
2012
- 2012-12-10 CN CN 201220678226 patent/CN203084154U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686580A (en) * | 2013-12-30 | 2014-03-26 | 福建星网视易信息系统有限公司 | Automatic test method and device for multi-path audio output interface |
| CN103686580B (en) * | 2013-12-30 | 2016-06-15 | 福建星网视易信息系统有限公司 | A kind of multi-path audio output interface automatic test approach and equipment |
| CN106154096A (en) * | 2015-04-27 | 2016-11-23 | 中兴通讯股份有限公司 | Audio connecting cord detection method and device |
| CN106154096B (en) * | 2015-04-27 | 2019-12-10 | 中兴通讯股份有限公司 | audio connecting line detection method and device |
| CN108064347A (en) * | 2017-11-28 | 2018-05-22 | 福建联迪商用设备有限公司 | The audio pin test method and test device of communication module |
| CN111698630A (en) * | 2019-12-02 | 2020-09-22 | 芯讯通无线科技（上海）有限公司 | Test system of audio interface of wireless communication module |
| CN111698630B (en) * | 2019-12-02 | 2022-04-05 | 芯讯通无线科技（上海）有限公司 | Test system of audio interface of wireless communication module |
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