CN212752585U - USB digital signal earphone switching circuit - Google Patents
USB digital signal earphone switching circuit Download PDFInfo
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- CN212752585U CN212752585U CN202021696467.1U CN202021696467U CN212752585U CN 212752585 U CN212752585 U CN 212752585U CN 202021696467 U CN202021696467 U CN 202021696467U CN 212752585 U CN212752585 U CN 212752585U
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Abstract
The utility model provides a USB digital signal earphone switching circuit belongs to the earphone circuit field. The utility model discloses an audio decoding module that is used for connecing smart machine's first interface module, links to each other with first interface module still includes the second interface module that links to each other with audio decoding module, wherein, second interface module includes earphone interface and 1 above microphone interface. The utility model has the advantages that: support smart machine external microphone and earphone interface simultaneously to can not influence tone quality.
Description
Technical Field
The utility model relates to a display screen structure especially relates to a USB digital signal earphone switching circuit.
Background
The existing intelligent equipment is provided with USB or Lightning interfaces, and the USB or Lightning interfaces are digital signal interfaces and are not suitable for the traditional mold core signal earphone head, so that a signal adapter is needed, and the digital signal interface of the mobile phone can identify and support the traditional earphone analog signal interface.
The existing adapter is an earphone interface, the microphone and the earphone are integrated and fixedly arranged on the earphone, and the microphone and the earphone cannot be connected simultaneously. When in the occasions such as live broadcast, the effect of receiving the voice is not good, and the use is very inconvenient.
SUMMERY OF THE UTILITY MODEL
For solving the problem among the prior art, the utility model provides a USB digital signal earphone switching circuit.
The utility model discloses an audio decoding module that is used for connecing smart machine's first interface module, links to each other with first interface module still includes the second interface module that links to each other with audio decoding module, wherein, second interface module includes earphone interface and 1 above microphone interface.
The utility model discloses make further improvement, first interface module is the USB interface.
The utility model discloses make further improvement, the earphone interface is the four-section type 3.5mm standard earphone interface of built-in microphone, the microphone interface is the pure microphone interface of 3.5mm of syllogic.
The utility model discloses make further improvement, the audio frequency decoding module is including decoding chip U1, wherein, the DM and the DP pin of U1 link to each other with the signal pin of USB interface respectively, the MIC input pin, the earphone signal input pin of decoding chip U1 link to each other with second interface module respectively.
The utility model is further improved, the second interface module comprises an earphone interface CON2 and a microphone interface CON3, wherein,
Compared with the prior art, the beneficial effects of the utility model are that: the performance is stable, and the use is convenient; on the basis of the existing audio decoding circuit, multiple interfaces are expanded, the circuit is simple, and the performance of the whole circuit cannot be influenced; support smart machine external microphone and earphone simultaneously, the tone quality is effectual.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model discloses an audio decoding module that is used for connecing smart machine such as cell-phone's first interface module, links to each other with first interface module still includes the second interface module that links to each other with audio decoding module, wherein, second interface module includes earphone interface and 1 above microphone interface.
The first interface module in this embodiment is a USB interface, may also be a Type-C interface, and may also be a Lightning interface of an apple mobile phone. Of course, the present embodiment may also be a conventional earphone interface, which supports the interface expansion of the conventional earphone interface.
The audio decoding module of this example includes a decoding chip U1, wherein the DM and DP pins of the U1 are respectively connected to the signal pins of the USB interface, and the MIC input pin and the headphone signal input pin of the decoding chip U1 are respectively connected to the second interface module.
The main improvement point of the present example is that the second interface module is provided, the earphone interface of the present example is consistent with the earphone interface of the standard mobile phone, and is a four-section type 3.5mm standard earphone interface with a built-in microphone, including a national standard earphone interface and a American standard earphone interface, and the microphone interface of the present example is a three-section type 3.5mm pure microphone interface.
The second interface module in this example comprises an earphone interface CON2 and a microphone interface CON3, wherein,
The microphone interface CON3 in this example is a common earphone interface, in which a spring piece is provided inside to connect the pins 4 and 5, when a microphone plug is inserted, the spring piece is disconnected, an audio signal is transmitted to the pin 7 of the decoding chip U1 through the microphone interface CON3, and an earphone analog signal is output to the earphone interface CON2 through the pins 8 and 9 of the decoding chip U1.
When the microphone interface CON3 has no microphone plug inserted, pin 4 of the earphone interface CON2 is connected to pin 4 through pin 5 of the microphone interface CON3 and further connected to the decoding chip U1 through pin 1, the audio signal is transmitted to pin 7 of the decoding chip U1 through the earphone interface CON2 and the microphone interface CON3, and the earphone analog signal is output to the earphone interface CON2 through pins 8 and 9 of the decoding chip U1, so that the earphone interface CON2 supports the input and output of the audio signal at the same time without affecting the performance and sound quality of the whole circuit.
Compared with the prior art, the beneficial effects of the utility model are that: the performance is stable, and the use is convenient; on the basis of the existing audio decoding circuit, multiple interfaces are expanded, the circuit is simple, and the performance of the whole circuit cannot be influenced; support smart machine external microphone and earphone simultaneously, the tone quality is effectual.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the present invention are within the protection scope of the present invention.
Claims (5)
1. The utility model provides a USB digital signal earphone switching circuit which characterized in that: the intelligent device comprises a first interface module used for connecting the intelligent device, an audio decoding module connected with the first interface module, and a second interface module connected with the audio decoding module, wherein the second interface module comprises an earphone interface and more than 1 microphone interface.
2. The USB digital signal headset adapter circuit of claim 1, wherein: the first interface module is a USB interface.
3. The USB digital signal headset adapter circuit of claim 2, wherein: the earphone interface is a four-section type 3.5mm standard earphone interface with a built-in microphone, and the microphone interface is a three-section type 3.5mm pure microphone interface.
4. The USB digital signal earphone adapter circuit of claim 3, wherein: the audio decoding module comprises a decoding chip U1, wherein DM and DP pins of the U1 are respectively connected with signal pins of a USB interface, and an MIC input pin and an earphone signal input pin of the decoding chip U1 are respectively connected with the second interface module.
5. The USB digital signal earphone adapter circuit of claim 4, wherein: the second interface module comprises an earphone interface CON2 and a microphone interface CON3, wherein,
pin 3 of the earphone interface CON2 is grounded, pin 1 is connected to pin 9HP-OUTL of the decoding chip U1, pin 2 of the earphone interface CON2 is connected to pin 8 HP-OUTL of the decoding chip U1, pin 4 is connected to pin 5 of the microphone interface CON3, pins 5 and 6 of the earphone interface CON2 are suspended,
pin 3 of the microphone interface CON3 is grounded, pin 1 is connected to pin 7MIC-IN of the decoding chip U1, pins 2 and 6 of the microphone interface CON3 are suspended, and pin 4 of the microphone interface CON3 is connected to pin 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021696467.1U CN212752585U (en) | 2020-08-14 | 2020-08-14 | USB digital signal earphone switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021696467.1U CN212752585U (en) | 2020-08-14 | 2020-08-14 | USB digital signal earphone switching circuit |
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| Publication Number | Publication Date |
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| CN212752585U true CN212752585U (en) | 2021-03-19 |
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| CN202021696467.1U Active CN212752585U (en) | 2020-08-14 | 2020-08-14 | USB digital signal earphone switching circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023081963A1 (en) * | 2021-11-12 | 2023-05-19 | Freedman Electronics Pty Ltd | Microphone system and methods |
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2020
- 2020-08-14 CN CN202021696467.1U patent/CN212752585U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023081963A1 (en) * | 2021-11-12 | 2023-05-19 | Freedman Electronics Pty Ltd | Microphone system and methods |
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