CN203151737U - Earphone test expanding circuit - Google Patents
Earphone test expanding circuit Download PDFInfo
- Publication number
- CN203151737U CN203151737U CN 201320022595 CN201320022595U CN203151737U CN 203151737 U CN203151737 U CN 203151737U CN 201320022595 CN201320022595 CN 201320022595 CN 201320022595 U CN201320022595 U CN 201320022595U CN 203151737 U CN203151737 U CN 203151737U
- Authority
- CN
- China
- Prior art keywords
- unit
- contact
- mic
- channel control
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Stereophonic Arrangements (AREA)
Abstract
The utility model discloses an earphone test expanding circuit. According to the earphone test expanding circuit, a channel control unit is provided with a channel input contact, a left channel control contact and a right channel control contact; an audio unit is provided with a first output end and a second output end, wherein the first output end is electrically connected with the channel input contact; a power amplification unit is provided with an MIC positive input end and an MIC negative input end, which are electrically connected with a voltmeter respectively; a first input end of an MIC test unit is electrically connected with the second output end, and a second input end of the MIC test unit is electrically connected with the MIC positive input end; and a socket unit is electrically connected with the second output end, the left channel control contact, the right channel control contact and the MIC positive input end respectively. The needs of different earphone connector contacts are satisfied by arranging the socket unit and electrically connecting the socket unit with the second output end, the left channel control contact, the right channel control contact and the MIC positive input end respectively.
Description
Technical field
The utility model relates to the earphone communication technique field, especially relates to a kind of earphone test expanded circuit.
Background technology
The voice call effect is one of important indicator of weighing mobile communication terminal quality quality, and therefore the testing cassete to the mobile communication terminal audio frequency detects the attention that more and more is subjected to manufacturer and user.
In the production industry of earphone production industry, particularly handset earphone, need every performance index of test earphone, to determine that whether qualified earphone is.Existing method of testing is generally: directly insert earphone in the mobile phone, by playing music the left and right acoustic channels (in fact being two loud speakers corresponding with left and right acoustic channels) of earphone is tested, and by calling microphone and the button of earphone are tested.Such method of testing not only wastes time and energy, and occurs the erroneous judgement of left and right acoustic channels easily.
The Earphone joint that has exists number of contacts greater than 4 structure, and existing test circuit to be only limited to test earphone joint contact be 4 structure, so need to produce the testing cassete of coupling Earphone joint contact, cause the inconvenience in the test, increased testing cost simultaneously.
The utility model content
Based on this, be necessary the problem at the existence of above-mentioned background technology, a kind of earphone test expanded circuit that mates the Earphone joint contact is provided.
For achieving the above object, the utility model discloses a kind of earphone test expanded circuit, it comprises audio unit, the sound channel control unit, the output signal unit, power amplifier unit, the MIC test cell, switch switching unit, loudspeaker unit and voltmeter, described sound channel control unit is provided with sound channel input contact, L channel control contact and R channel control contact, described audio unit is provided with first output and second output, described first output and sound channel input contact electrically connect, described second output, L channel control contact and R channel control contact electrically connect with the output signal unit respectively, described power amplifier unit is provided with power input, the audio output, MIC positive input terminal and MIC negative input end, described power input is circumscribed with DC power supply, described audio output and loudspeaker unit electrically connect, described MIC positive input terminal and MIC negative input end electrically connect with described voltmeter respectively, described MIC test cell first input end and described second output electrically connect, described MIC test cell second input and described MIC positive input terminal electrically connect, and described switch switching unit is electrically connected between described audio unit and the MIC negative input end; Described socket unit electrically connects with second output, L channel control contact, R channel control contact and MIC positive input terminal respectively.
Among embodiment, described DC power supply voltage is 12V therein.
Among embodiment, described output signal unit is circumscribed with test earphone therein.
Therein among embodiment, described switch switching unit is provided with contact, first contact and second contact, described contact is electrically connected at the MIC negative input end, described second contact is electrically connected at described second output, described first contact is electrically connected with an end of ohmmeter, and the described ohmmeter other end and described first output electrically connect.
Among embodiment, described socket unit is the N contact configuration therein, and N is more than or equal to 5.
In sum, the utility model earphone test expanded circuit is by arranging socket unit, and socket unit electrically connected with second output, L channel control contact, R channel control contact and MIC positive input terminal respectively, coupling socket unit external circuit plate satisfies the demand of different Earphone joints contact.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
For further understanding feature of the present utility model, technological means and the specific purposes that reach, function, below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
As shown in Figure 1, the utility model earphone test expanded circuit comprises audio unit 10, sound channel control unit 20, output signal unit 30, power amplifier unit 40, MIC test cell 50, switch switching unit 60, loudspeaker unit 70, voltmeter 80 and socket unit 90, described sound channel control unit 20 is provided with sound channel input contact 21, L channel control contact 22 and R channel control contact 23, described audio unit 10 is in order to output audio signal, described audio unit 10 is provided with first output 11 and second output 12, described first output 11 electrically connects with sound channel input contact 21, described second output 12, L channel control contact 22 and R channel control contact 23 electrically connect with output signal unit 30 respectively, described output signal unit 30 is circumscribed with test earphone, described L channel control contact 22 in order to the earphone L channel performance test open or close, described R channel control contact 23 in order to the earphone R channel performance test open or close.
Described power amplifier unit 40 is provided with power input 41, audio output 42, MIC positive input terminal 43 and MIC negative input end 44, described power input 41 is circumscribed with DC power supply DC, described DC power supply dc voltage is 12V, described audio output 42 electrically connects with loudspeaker unit 70, described MIC positive input terminal 43 and MIC negative input end 44 electrically connect with the positive terminal of described voltmeter 80 and negative pole end respectively, loop voltage variation when described voltmeter 80 export in order to recorde audio signal.
Described MIC test cell 50 first input ends and described second output 12 electrically connect, and described MIC test cell 50 second inputs and described power amplifier unit 40MIC positive input terminal 43 electrically connect.
Described switch switching unit 60 is electrically connected between described audio unit 10 and the MIC negative input end 44, described switch switching unit 60 is provided with contact K, the first contact K1 and the second contact K2, described contact K is electrically connected at MIC negative input end 44, the described second contact K2 is electrically connected at described second output 12, so that external test earphone is carried out audio-frequency test, the described first contact K1 is electrically connected with the end of ohmmeter G, the described ohmmeter G other end and described first output 11 electrically connect, external test earphone is carried out the impedance parameter test.
Described socket unit 90 is the N contact configuration, and N is more than or equal to 5; Described socket unit 90 electrically connects with second output 12, L channel control contact 22, R channel control contact 23 and MIC positive input terminal 43 respectively, but described socket unit 90 external circuit plates satisfy the demand of different Earphone joints contact.
During the utility model work, when contact K and second contact K2 connection, when audio signal is exported by audio unit 10, test earphone is inserted output signal unit 30, connect L channel control contact 22 and R channel control contact 23 respectively, respectively the channel audio test of test earphone is judged change in voltage in loop during voltmeter 80 record earphone tests simultaneously; Test earphone is inserted MIC test cell 50, by the phone output effect of loudspeaker unit 70 simulation partner.When contact K and first contact K1 connection, with the impedance parameter of test earphone, the internal driving of control and measuring earphone changes.
In sum, the utility model earphone test expanded circuit is by arranging socket unit 90, and socket unit 90 electrically connected with second output 12, L channel control contact 22, R channel control contact 23 and MIC positive input terminal 43 respectively, coupling socket unit 90 external circuit plates satisfy the demand of different Earphone joints contact.
The above embodiment has only expressed a kind of execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (5)
1. an earphone is tested expanded circuit, it is characterized in that: comprise audio unit (10), sound channel control unit (20), output signal unit (30), power amplifier unit (40), MIC test cell (50), switch switching unit (60), loudspeaker unit (70), voltmeter (80) and socket unit (90), described sound channel control unit (20) is provided with sound channel input contact (21), L channel control contact (22) and R channel control contact (23), described audio unit (10) is provided with first output (11) and second output (12), described first output (11) electrically connects with sound channel input contact (21), described second output (12), L channel control contact (22) and R channel control contact (23) electrically connect with output signal unit (30) respectively, described power amplifier unit (40) is provided with power input (41), audio output (42), MIC positive input terminal (43) and MIC negative input end (44), described power input (41) is circumscribed with DC power supply (DC), described audio output (42) electrically connects with loudspeaker unit (70), described MIC positive input terminal (43) and MIC negative input end (44) electrically connect with described voltmeter (80) respectively, described MIC test cell (50) first input end and described second output (12) electrically connect, described MIC test cell (50) second inputs and described MIC positive input terminal (43) electrically connect, and described switch switching unit (60) is electrically connected between described audio unit (10) and the MIC negative input end (44); Described socket unit (90) electrically connects with second output (12), L channel control contact (22), R channel control contact (23) and MIC positive input terminal (43) respectively.
2. earphone according to claim 1 is tested expanded circuit, and it is characterized in that: described DC power supply (DC) voltage is 12V.
3. earphone according to claim 1 is tested expanded circuit, and it is characterized in that: described output signal unit (30) is circumscribed with test earphone.
4. earphone according to claim 1 is tested expanded circuit, it is characterized in that: described switch switching unit (60) is provided with contact (K), first contact (K1) and second contact (K2), described contact (K) is electrically connected at MIC negative input end (44), described second contact (K2) is electrically connected at described second output (12), described first contact (K1) is electrically connected with an end of ohmmeter (G), and described ohmmeter (G) other end and described first output (11) electrically connect.
5. earphone according to claim 1 is tested expanded circuit, it is characterized in that: described socket unit (90) is the N contact configuration, and N is more than or equal to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320022595 CN203151737U (en) | 2013-01-16 | 2013-01-16 | Earphone test expanding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320022595 CN203151737U (en) | 2013-01-16 | 2013-01-16 | Earphone test expanding circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203151737U true CN203151737U (en) | 2013-08-21 |
Family
ID=48979225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320022595 Expired - Fee Related CN203151737U (en) | 2013-01-16 | 2013-01-16 | Earphone test expanding circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203151737U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647863A (en) * | 2013-12-27 | 2014-03-19 | 上海斐讯数据通信技术有限公司 | Two mobile terminals-based method and system for mutually testing headset loop |
| CN110113469A (en) * | 2019-05-07 | 2019-08-09 | 惠州Tcl移动通信有限公司 | Tested speech breaks through signal circuit and its method for measurement |
-
2013
- 2013-01-16 CN CN 201320022595 patent/CN203151737U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647863A (en) * | 2013-12-27 | 2014-03-19 | 上海斐讯数据通信技术有限公司 | Two mobile terminals-based method and system for mutually testing headset loop |
| CN103647863B (en) * | 2013-12-27 | 2017-10-24 | 上海斐讯数据通信技术有限公司 | A kind of method and system that earphone loop is mutually measured based on two mobile terminals |
| CN110113469A (en) * | 2019-05-07 | 2019-08-09 | 惠州Tcl移动通信有限公司 | Tested speech breaks through signal circuit and its method for measurement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201928419U (en) | Earphone and mobile communication terminal provided with same | |
| CN103260105B (en) | A kind of method and apparatus utilizing the power supply of electronic equipment to power to ANC earphone | |
| CN1859813B (en) | Signal switching method for internal and external microphone | |
| CN204836506U (en) | Headset patch cord | |
| CN103118191B (en) | Using control method and mobile terminal for iPhone wire control earphone | |
| CN201142743Y (en) | Headphone interface circuit and mobile phone with the same | |
| CN103260124B (en) | The audio testing method of mobile terminal and test macro thereof | |
| CN101924835A (en) | Mobile telephone communication method and mobile telephone | |
| CN102395072B (en) | A kind of headset plug and earphone thereof | |
| CN101938546A (en) | Earphone microphone detection method based on mobile phone and mobile phone | |
| CN107770662B (en) | Automatic charging and switching circuit | |
| CN203251411U (en) | Active noise cancellation (ANC) earphone | |
| CN1832365A (en) | Multifunction blue-tooth earphone and its implementing method | |
| CN203027489U (en) | Indication circuit for testing earphone | |
| CN102710821B (en) | Hand microphone for interphone and interphone | |
| CN203251412U (en) | Device capable of using power source of electronic equipment to supply power to automatic noise cancellation (ANC) earphone | |
| CN203151737U (en) | Earphone test expanding circuit | |
| CN203027488U (en) | Earphone testing circuit | |
| CN202998471U (en) | An earphone testing box | |
| CN204633989U (en) | Earphone socket and electronic equipment | |
| CN207978124U (en) | A kind of impedance detection circuit and multimedia equipment | |
| CN207283779U (en) | Intelligent watch accompanies robot with the intelligence that Baffle Box of Bluetooth combines | |
| CN201781517U (en) | Mobile phone device | |
| CN203193848U (en) | Denoising earphone and earphone plug thereof | |
| CN202998472U (en) | An earphone test indicating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20160116 |
|
| EXPY | Termination of patent right or utility model |