CN201781618U - Earphone detection circuit with high reliability - Google Patents
Earphone detection circuit with high reliability Download PDFInfo
- Publication number
- CN201781618U CN201781618U CN2010205139094U CN201020513909U CN201781618U CN 201781618 U CN201781618 U CN 201781618U CN 2010205139094 U CN2010205139094 U CN 2010205139094U CN 201020513909 U CN201020513909 U CN 201020513909U CN 201781618 U CN201781618 U CN 201781618U
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- Prior art keywords
- earphone
- detection circuit
- signal output
- socket
- detection signal
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- Expired - Fee Related
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Abstract
The utility model discloses an earphone detection circuit with high reliability, which comprises an earphone socket. A jack into which an earphone plug is inserted is arranged outside the earphone socket, and two spring sheet detection switches driven by the inserted earphone plug are arranged in the earphone socket. The earphone detection circuit is characterized in that a left earphone channel input end and a right earphone channel input end which are respectively connected with a left channel and a right channel of an earphone are arranged in the jack of the earphone socket; the left earphone channel input end and the right earphone channel input end are respectively connected with a pull-down resistor and then are grounded; two stationary contacts of the two spring sheet detection switches are connected together, and then extend out of the external of the earphone socket to form a signal detection output end; and the signal detection output end is connected with a pull-up resistor and then is connected with a high-level power supply. The utility model is aimed at providing the earphone detection circuit which can detect the switches on two sides and has high detection reliability.
Description
[technical field]
The utility model relates to the high headset detection circuit of a kind of reliability.
[background technology]
At present, whether general headset detection circuit is to detect earphone by the detection single sided switched to insert, and the then common unsettled not usefulness of opposite side headset detection switch can not play a role.The headset detection circuit of said structure has following shortcoming: because the sense switch of common earphone socket all is to realize by metal clips, when earphone inserts, back down shell fragment by headset plug, can realize that switch reliably disconnects.But when extracting, earphone need connect switch, so the phenomenon that loose contact might occur or can not contact fully sometimes by the elastic force resilience of shell fragment self.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, and providing a kind of can detect the bilateral switch, the headset detection circuit that detecting reliability is high.
For achieving the above object, the utility model has adopted following technical proposal:
The headset detection circuit that a kind of reliability is high, include earphone socket J1, be provided with the jack that inserts for headset plug in earphone socket J1 outside, in earphone socket J1, be provided with two shell fragment sense switches by the headset plug drive actions of inserting, it is characterized in that in the jack of earphone socket J1, being provided with the earphone left side passage input that is connected respectively with earphone left side passage, right passage, the right passage input of earphone, described earphone left side passage input and the right passage input of earphone are connected with ground connection AGND behind the pull down resistor respectively; Stretch out the outside detection signal output that forms of earphone socket J1 after two fixed contacts of described two shell fragment sense switches connect, the detection signal output meets high level power supply VCC after connecting pull-up resistor.
Be connected with 2 diodes between two fixed contacts of described two shell fragment sense switches and detection signal output, the negative pole of 2 diodes is connected with two fixed contacts respectively, and the positive pole of 2 diodes connects with the detection signal output and is connected.
On earphone left side passage input and the right passage input of earphone, also be in series with coupling capacitance.
Between two fixed contacts of described two shell fragment sense switches and detection signal output, be connected with 2 resistance respectively.
Compared with prior art, the beneficial effects of the utility model are: because the detection signal output of this testing circuit all is connected with two fixed contacts of 2 two shell fragment sense switches, when earphone is extracted, as long as a connection is arranged in 2 shell fragment sense switches, the detection signal output will drag down by diode and pull down resistor, thus the low level of detecting.Therefore, when a shell fragment sense switch loose contact, this circuit can also be realized reliable Detection, the reliability height of work.
[description of drawings]
Fig. 1 is circuit theory diagrams of the present utility model.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and execution mode of the present utility model:
Referring to Fig. 1, the headset detection circuit that a kind of reliability is high, include earphone socket J1, be provided with the jack that inserts for headset plug in earphone socket J1 outside, in earphone socket J1, be provided with two shell fragment sense switches by the headset plug drive actions of inserting, in the jack of earphone socket J1, be provided with the earphone left side passage input 2 that is connected respectively with earphone left side passage, right passage, the right passage input 1 of earphone, described earphone left side passage input 2 and the right passage input 1 of earphone are connected with ground connection AGND behind pull down resistor R3, the R2 respectively; Stretch out the outside detection signal output 3 that forms of earphone socket J1 after two fixed contacts of described two shell fragment sense switches connect, meet high level power supply VCC after detection signal output 3 connects pull-up resistor R1.
On earphone left side passage input and the right passage input of earphone, also be in series with coupling capacitance C1, C2.
Embodiment 1: be connected with 2 diode D1, D2 between two fixed contacts of described two shell fragment sense switches and detection signal output, the negative pole of 2 diodes is connected with two fixed contacts respectively, and the positive pole of 2 diodes connects with the detection signal output and is connected.When earphone was extracted, as long as in 2 shell fragment sense switches a connection is arranged, the detection signal output will drag down by diode and pull down resistor, thus the low level of detecting.Therefore, when a shell fragment sense switch loose contact, this circuit can also be realized reliable Detection, the reliability height of work.Because diode D1, D2 oppositely are connected between earphone left side passage input and the right passage input of earphone, therefore can not cause crosstalking between the right passage input of earphone left side passage input and earphone, and normal audio signal is had no adverse effects.
Embodiment 2: when performance requirement is not high, also can be connected with 2 resistance respectively between two fixed contacts of described two shell fragment sense switches and detection signal output, with diode D1, D2 replaces with 2 resistance of 1K, further reduces circuit cost.Left and right sides interchannel had slightly and crosstalked this moment.
Claims (4)
1. headset detection circuit that reliability is high, include earphone socket (J1), be provided with the jack that inserts for headset plug in earphone socket (J1) outside, in earphone socket (J1), be provided with two shell fragment sense switches by the headset plug drive actions of inserting, it is characterized in that in the jack of earphone socket (J1), being provided with the earphone left side passage input that is connected respectively with earphone left side passage, right passage, the right passage input of earphone, described earphone left side passage input and the right passage input of earphone are connected with ground connection (AGND) behind the pull down resistor respectively; Stretch out the outside detection signal output that forms of earphone socket (J1) after two fixed contacts of described two shell fragment sense switches connect, the detection signal output connects high level power supply (VCC) after connecting pull-up resistor.
2. the headset detection circuit that a kind of reliability according to claim 1 is high, it is characterized in that, between two fixed contacts of described two shell fragment sense switches and detection signal output, be connected with 2 diodes, the negative pole of 2 diodes is connected with two fixed contacts respectively, and the positive pole of 2 diodes connects with the detection signal output and is connected.
3. the headset detection circuit that a kind of reliability according to claim 1 and 2 is high is characterized in that, also is in series with coupling capacitance on earphone left side passage input and the right passage input of earphone.
4. the headset detection circuit that a kind of reliability according to claim 1 is high is characterized in that, is connected with 2 resistance respectively between two fixed contacts of described two shell fragment sense switches and detection signal output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205139094U CN201781618U (en) | 2010-08-27 | 2010-08-27 | Earphone detection circuit with high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205139094U CN201781618U (en) | 2010-08-27 | 2010-08-27 | Earphone detection circuit with high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781618U true CN201781618U (en) | 2011-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205139094U Expired - Fee Related CN201781618U (en) | 2010-08-27 | 2010-08-27 | Earphone detection circuit with high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781618U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031468A1 (en) * | 2010-09-08 | 2012-03-15 | 中兴通讯股份有限公司 | Earphone pulling and plugging detection circuit |
| CN103024632A (en) * | 2012-12-30 | 2013-04-03 | 青岛歌尔声学科技有限公司 | Noise reduction device of earphone |
| CN104160718A (en) * | 2012-04-06 | 2014-11-19 | 高通股份有限公司 | Headset switches with crosstalk reduction |
| CN105448306A (en) * | 2015-11-05 | 2016-03-30 | 湖南工业大学 | Voice loop detection system |
| CN105578353A (en) * | 2014-10-31 | 2016-05-11 | 快捷半导体(苏州)有限公司 | Circuit for coupling USB audio dongle with electronic device and method for reducing crosstalk |
-
2010
- 2010-08-27 CN CN2010205139094U patent/CN201781618U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031468A1 (en) * | 2010-09-08 | 2012-03-15 | 中兴通讯股份有限公司 | Earphone pulling and plugging detection circuit |
| US9332350B2 (en) | 2010-09-08 | 2016-05-03 | Zte Corporation | Earphone pulling and plugging detection circuit |
| CN104160718A (en) * | 2012-04-06 | 2014-11-19 | 高通股份有限公司 | Headset switches with crosstalk reduction |
| CN104160718B (en) * | 2012-04-06 | 2018-12-04 | 高通股份有限公司 | A kind of device and method for media device |
| CN103024632A (en) * | 2012-12-30 | 2013-04-03 | 青岛歌尔声学科技有限公司 | Noise reduction device of earphone |
| CN105578353A (en) * | 2014-10-31 | 2016-05-11 | 快捷半导体(苏州)有限公司 | Circuit for coupling USB audio dongle with electronic device and method for reducing crosstalk |
| US9936317B2 (en) | 2014-10-31 | 2018-04-03 | Fairchild Semiconductor Corporation | Audio crosstalk calibration switch |
| CN105448306A (en) * | 2015-11-05 | 2016-03-30 | 湖南工业大学 | Voice loop detection system |
| CN105448306B (en) * | 2015-11-05 | 2019-02-19 | 湖南工业大学 | Voice loop detecting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20120827 |