CN210986400U - Voice input double-microphone device of interphone - Google Patents
Voice input double-microphone device of interphone Download PDFInfo
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- CN210986400U CN210986400U CN201922329404.6U CN201922329404U CN210986400U CN 210986400 U CN210986400 U CN 210986400U CN 201922329404 U CN201922329404 U CN 201922329404U CN 210986400 U CN210986400 U CN 210986400U
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Abstract
The utility model provides an intercom voice input double wheat device, include: the silicon microphone is connected to the audio decoding circuit through the audio switching switch circuit, the electret microphone is connected to the audio coding and decoding circuit, and the audio coding and decoding circuit is connected to the talkback module. The utility model discloses a circuit frame and structural design can realize switching and integrating for silicon microphone and electret microphone and provide the hardware circuit basis, and then can provide the hardware basis for the advantage of integrated silicon microphone and electret microphone, directly solves the noise interference problem of end user when using the intercom, has promoted the humanized design and the user experience of product.
Description
Technical Field
The utility model relates to an intercom input device especially relates to an intercom voice input double wheat device.
Background
In the interphone input device, if a mobile phone terminal, namely a mobile phone platform based on an android platform, is adopted to realize L TE broadband communication, so that the functions of wide coverage and high bandwidth are met, and if narrowband digital analog DMR function modules are adopted to realize narrowband emergency communication, the interphone input device is applied to the scenes of military police, rail transit, airport terminals, community management and the like, although the advantages of the product forms are obvious, the interphone input device also has some defects, for example, because a L TE mobile phone end uses a microphone with omnidirectional and high sensitivity, the interphone has the problems of wide audio input frequency domain, low signal-to-noise ratio, poor audio quality after receiving and demodulating and various noises, so if the interphone integrating different input end advantages can be provided, the corresponding defects can be solved, and the technical problem which needs to be solved urgently is solved.
Disclosure of Invention
The utility model aims to solve the technical problem that a need provide one kind can realize switching and the integrated two microphone devices of intercom speech input that provide the hardware circuit basis for silicon microphone and electret microphone, and then for the advantage of integrated silicon microphone and electret microphone provides the hardware basis, promotes humanized design and the user experience of product.
To this end, the utility model provides an intercom speech input pair wheat device, include: the silicon microphone is connected to the audio decoding circuit through the audio switching switch circuit, the electret microphone is connected to the audio coding and decoding circuit, and the audio coding and decoding circuit is connected to the talkback module.
The utility model discloses a further improvement lies in, audio frequency change over switch circuit's input with the silicon wheat is connected, an output of audio frequency change over switch circuit with an input of audio frequency coding and decoding circuit is connected.
The utility model discloses a further improvement lies in, still includes mobile phone module, another output of audio frequency change over switch circuit with mobile phone module is connected.
The utility model discloses a further improvement lies in, mobile phone module's control end is connected to audio frequency change over switch circuit's configuration end.
The utility model discloses a further improvement lies in, still include radio frequency transceiver chip and radio frequency antenna, mobile phone module passes through radio frequency transceiver chip is connected to radio frequency antenna.
The utility model discloses a further improvement lies in, still includes power supply module, power supply module with audio frequency coding and decoding circuit is connected.
The utility model discloses a further improvement lies in, power supply module includes DC/DC step-down circuit and the linear voltage stabilizing circuit of L DO, DC/DC step-down circuit passes through the linear voltage stabilizing circuit of L DO is connected to audio frequency codec circuit.
The utility model discloses a further improvement lies in, DC/DC step-down circuit still with audio frequency change over switch circuit is connected.
Compared with the prior art, the beneficial effects of the utility model reside in that: through circuit frame and structural design, can realize switching and integrating for silicon microphone and electret microphone and provide the hardware circuit basis, and then can provide the hardware basis for the advantage of integrated silicon microphone and electret microphone, directly solve the noise interference problem of end user when using the intercom, promoted the humanized design and the user experience of product.
Drawings
Fig. 1 is a block diagram of a circuit module according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an audio frequency switch circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an audio codec circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a power supply module according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to fig. 3, this embodiment provides an intercom voice input dual-microphone device, including: silicon microphone 1, audio frequency change over switch circuit 2, electret microphone 3, audio frequency codec circuit 4 and talkback module 5, silicon microphone 1 passes through audio frequency change over switch circuit 2 is connected to audio frequency decoder circuit, electret microphone 3 is connected to audio frequency codec circuit 4, the frequency codec circuit is connected to talkback module 5.
The silicon microphone 1 is also called an MEMS microphone in this example, and in this example, the silicon microphone can also be directly multiplexed with a silicon microphone of a mobile phone, and the silicon microphone 1 at the mobile phone end preferably adopts an MEMS silicon microphone with a Sensitivity (Sensitivity) of-42 dB and a signal-to-noise ratio of 60 dB; the audio frequency switch circuit 2 refers to a switch circuit where a switch chip U260 is located, and the switch chip U260 preferably adopts a DIO3157E chip; the electret microphone 3 mainly comprises two parts of sound-electricity conversion and impedance transformation, is a common microphone of the existing interphone, for example, an electret microphone with the sensitivity of-38 dB and the signal-to-noise ratio of about 70dB is selected; the audio codec circuit 4 refers to a circuit where an audio codec chip U27 is located, and the audio codec chip U27 preferably adopts an ES8316 chip; the talkback module 5 can be realized by adopting the talkback module of the existing interphone.
As shown in fig. 1 to fig. 3, in this example, an INPUT terminal (MEMS _ MIC _ INPUT in fig. 2) of the audio switch circuit 2 is connected to the silicon microphone 1, and is used for implementing audio INPUT of the silicon microphone 1; an output end (MEMS _ MIC _ inter in fig. 2) of the audio switch circuit 2 is connected to an input end (MEMS _ MIC _ inter in fig. 3) of the audio codec circuit 4, and is configured to implement encoding and decoding of the input audio of the microphone 1. The electret microphone 3 is directly connected to MIC2_ INPUT _ P of fig. 3, so as to realize encoding and decoding of the INPUT audio of the electret microphone 3.
In the embodiment, the audio frequency switch circuit 2 is used for designing a switching circuit of two paths of microphones, a silicon microphone is used in an L TE mode, two paths of microphones can be selected at will in an interphone mode, and on the basis, an audio frequency DSP codec circuit is designed through the audio frequency coding and decoding circuit 4, so that two paths of sound source input is supported, and interaction of digital audio and output of an analog audio frequency source are supported.
As shown in fig. 1 to 3, the present embodiment further includes a handset module 6, and another output terminal (MEMS _ MIC _ PHONE in fig. 2) of the audio switch circuit 2 is connected to the handset module 6. The mobile phone module 6 refers to a processor of a mobile phone, and in practical application, may also be a processor of hardware of other mobile terminals. The control end of the mobile phone module 6 is connected to the configuration end (AUDIO _ SWITCH) of the AUDIO SWITCH circuit 2, so as to provide a hardware basis for the configuration and control functions of the mobile phone module 6 on the AUDIO SWITCH circuit 2. The mobile phone module 6 is a mobile phone motherboard, and the talkback module 5 is added, and two motherboards are preferably adopted in this embodiment.
As shown in fig. 1, the present embodiment further preferably includes a radio frequency transceiver chip 7 and a radio frequency antenna 8, and the mobile phone module 6 is connected to the radio frequency antenna 8 through the radio frequency transceiver chip 7, so as to implement a radio frequency function.
As shown in fig. 4, this embodiment further preferably includes a power supply module 9, where the power supply module 9 is connected to the audio codec circuit 4, and more preferably, the power supply module 9 includes a DC/DC voltage-reducing circuit 901 and an L DO linear voltage-stabilizing circuit 902, where the DC/DC voltage-reducing circuit 901 is connected to the audio codec circuit 4 through the L DO linear voltage-stabilizing circuit 902, and the DC/DC voltage-reducing circuit 901 is further connected to the audio switch circuit 2, in the DC/DC voltage-reducing circuit 901, it is preferable that DC/DC voltage-reducing is implemented by 8.7V that is input, and a power supply that is reduced to 4V is input into the L DO linear voltage-stabilizing circuit 902 and the audio switch circuit 2 to implement power supply of a switch, and then, in the L DO linear voltage-stabilizing circuit 902, a power supply that is converted from 4V power supply into 3.3V that is input into the audio codec circuit 4 to implement power supply to the codec chip.
The reason why the power supply module 9 is designed as described above is that: because the intercom has adopted two lithium electricity designs, and the power is about 8.4V promptly, and non-traditional single lithium electricity is 4.2V, therefore, this example passes through the design of power supply module 9, need not to change the power of current intercom, and the compatibility can be stronger.
In summary, the present embodiment provides a hardware circuit foundation for the silicon microphone 1 and the electret microphone 3 to be switched and integrated through the circuit frame and the structural design thereof, and further provides a hardware foundation for the advantages of the integrated silicon microphone 1 and the electret microphone 3, so that the problem of noise interference when the terminal user uses the interphone is directly solved, and the humanized design and the user experience of the product are improved.
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 shape and structure of the present invention are within the protection scope of the present invention.
Claims (8)
1. The utility model provides an intercom voice input pair wheat device which characterized in that includes: the silicon microphone is connected to the audio coding and decoding circuit through the audio switching switch circuit, the electret microphone is connected to the audio coding and decoding circuit, and the audio coding and decoding circuit is connected to the talkback module.
2. The intercom voice input dual-microphone device according to claim 1, wherein an input terminal of the audio frequency switch circuit is connected to the silicon microphone, and an output terminal of the audio frequency switch circuit is connected to an input terminal of the audio frequency codec circuit.
3. The intercom voice input dual-microphone device according to claim 2, further comprising a mobile phone module, wherein the other output end of the audio frequency switch circuit is connected with the mobile phone module.
4. The intercom voice input dual-microphone device according to claim 3, wherein the control terminal of the handset module is connected to the configuration terminal of the audio frequency switch circuit.
5. The intercom voice input dual-microphone device according to claim 3, further comprising a radio frequency transceiver chip and a radio frequency antenna, wherein the mobile phone module is connected to the radio frequency antenna through the radio frequency transceiver chip.
6. The intercom voice input dual-microphone device according to any one of claims 1 to 5, further comprising a power supply module, wherein the power supply module is connected with the audio codec circuit.
7. The intercom voice-input dual-microphone device according to claim 6, wherein the power supply module comprises a DC/DC voltage reduction circuit and an L DO linear voltage stabilizing circuit, and the DC/DC voltage reduction circuit is connected to the audio codec circuit through the L DO linear voltage stabilizing circuit.
8. The intercom voice input dual microphone device according to claim 7, wherein the DC/DC voltage reduction circuit is further connected to the audio frequency switcher circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922329404.6U CN210986400U (en) | 2019-12-23 | 2019-12-23 | Voice input double-microphone device of interphone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922329404.6U CN210986400U (en) | 2019-12-23 | 2019-12-23 | Voice input double-microphone device of interphone |
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| CN210986400U true CN210986400U (en) | 2020-07-10 |
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| CN201922329404.6U Active CN210986400U (en) | 2019-12-23 | 2019-12-23 | Voice input double-microphone device of interphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684840A (en) * | 2020-12-21 | 2021-04-20 | 海信视像科技股份有限公司 | Audio acquisition device and electronic equipment |
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2019
- 2019-12-23 CN CN201922329404.6U patent/CN210986400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684840A (en) * | 2020-12-21 | 2021-04-20 | 海信视像科技股份有限公司 | Audio acquisition device and electronic equipment |
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