CN203466962U - Audio port identification circuit and communication device - Google Patents
Audio port identification circuit and communication device Download PDFInfo
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- CN203466962U CN203466962U CN201320524509.7U CN201320524509U CN203466962U CN 203466962 U CN203466962 U CN 203466962U CN 201320524509 U CN201320524509 U CN 201320524509U CN 203466962 U CN203466962 U CN 203466962U
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Abstract
The utility model discloses an audio port identification circuit and a communication device. The communication device comprises the audio port identification circuit. The audio port identification circuit comprises an audio interface, an audio access state detection module and an audio identification processing module. A first audio port and a second audio port of the audio interface are respectively connected with a first pin and a second pin of an audio head of an audio device. The audio port identification circuit generates corresponding detection signals according to audio interface states detected by the audio access state detection module and transmits the detection signals to the audio identification processing module; the audio identification processing module compares the level of the first audio port of the audio interface with the level of the second audio port of the audio interface according to the detection signals so as to identify the type of the currently accessed audio head, and the audio port with the lower level is set as a ground signal output; therefore, common grounding of the communication device and the audio device can be achieved, communication between the communication device and the audio device can be achieved, and besides, design cost and requirements of the audio port identification circuit are reduced.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of audio port identification circuit and communication equipment.
Background technology
The pinout of the audio head of the audio frequency apparatus of prior art and electric parameter are different, generally be divided into international standard (CTIA, Cellular Telecommunications Industry Association) and national standard (OMTP, Open Mobile Terminal Platform).The pinout of international standard is L/R/G/MIC+, and the pinout of national standard is L/R/MIC+/G.In order to improve the versatility of the audio interface of audio communication device, need to judge in advance the type of the audio head of access.
Conventionally, when the audio head of audio frequency apparatus is disconnected the audio interface of letter equipment, there is the pull-up resistor of 1.8V the microphone pin inside of audio head.Existing audio port identification circuit is in the type of judgement audio head, while differentiating the microphone pin of audio head and grounding pin, conventionally the detection scheme adopting is: first the first I/O (I/O) by microcontroller in communication equipment mouthful is by the grounding pin conducting of pin of audio head and microcontroller, by the 2nd I/O mouth of microcontroller, detect again the level of another pin of audio head, if being conducting to the grounding pin of microcontroller by an I/O mouth is the grounding pin of audio head, the level of the 2nd will detect+1.8V of I/O mouth of microcontroller, the type correct judgment of audio head is now described, the audio head of access mates with audio interface, if being conducting to the grounding pin of microcontroller by an I/O mouth is the microphone pin of audio head, the level of the 2nd will access-1.8V of I/O mouth of microcontroller, the type misjudgment of audio head is now described, the audio head of access does not mate with audio interface.Conventionally, the voltage on the I/O mouth of microcontroller is what not allow lower than-0.3V, otherwise the level state detecting according to I/O mouth can cause the type misjudgment to audio head, even burns the I/O mouth of microcontroller.Therefore; in above-mentioned detection scheme; if should accurately judge the type of audio head; protect again the I/O mouth of microcontroller not burnt; the I/O mouth of microcontroller wants to bear the voltage of access-1.8V; or microcontroller uses positive-negative power supply, like this, the type judgement of using separately the I/O mouth of microcontroller to make audio head has very high requirement to microcontroller.In addition, also have the special-purpose audio head type judgement chip of direct employing to do the type judgement of audio head, yet special-purpose audio head type judgement chip cost is higher.
Utility model content
Main purpose of the present utility model is to propose a kind of audio port identification circuit and communication equipment, is intended to realize the type of audio head is identified, and realizes communicating by letter of communication equipment and audio frequency apparatus, and design cost and the requirement of reduction audio port identification circuit.
In order to achieve the above object, the utility model proposes a kind of audio port identification circuit, comprise audio interface, by described audio interface, be connected with outside audio frequency apparatus, also comprise audio frequency access state detection module and audio identification processing module;
Described audio interface comprises the first audio port and the second audio port, be connected with the second pin with the first pin of the audio head of audio frequency apparatus respectively, described audio frequency access state detection module is connected with described audio identification processing module with described audio interface respectively, and described audio identification processing module is also connected with described audio interface;
Described audio frequency access state detection module, according to the state of the audio interface detecting, generates corresponding detection signal and exports described audio identification processing module to;
Described audio identification processing module is according to described detection signal, described the first audio port being relatively attached thereto and the level of the second audio port, and the lower audio port of level is set to earth signal output.
Preferably, described audio frequency access state detection module comprises first input end, the second input, positive output end, earth terminal, the first diode, the second diode, the 3rd diode and the 4th diode;
Described first input end is connected with described the first audio port, and described the second input is connected with described the second audio port, and described positive output end, earth terminal are connected with described audio identification processing module;
The negative electrode of described the first diode is connected with described the second input, and the anode of described the first diode is connected with described earth terminal; The anode of described the second diode is connected with described the second input, and the negative electrode of described the second diode is connected with described positive output end; The negative electrode of described the 3rd diode is connected with described first input end, and the anode of described the 3rd diode is connected with described earth terminal; The anode of described the 4th diode is connected with described first input end, and the negative electrode of described the 4th diode is connected with described positive output end.
Preferably, described audio identification processing module comprises microcontroller, and described microcontroller comprises the first I/O port, the second I/O port, the 3rd I/O port and grounding pin; Described the first I/O port is connected with described the first audio port, and described the second I/O port is connected with described the second audio port, and described the 3rd I/O port is connected with described positive output end, and described grounding pin is connected with described earth terminal.
The utility model also proposes a kind of communication equipment, this communication equipment comprises audio port identification circuit, this audio port identification circuit comprises audio interface, by described audio interface, is connected with outside audio frequency apparatus, also comprises audio frequency access state detection module and audio identification processing module;
Described audio interface comprises the first audio port and the second audio port, be connected with the second pin with the first pin of the audio head of audio frequency apparatus respectively, described audio frequency access state detection module is connected with described audio identification processing module with described audio interface respectively, and described audio identification processing module is also connected with described audio interface;
Described audio frequency access state detection module, according to the state of the audio interface detecting, generates corresponding detection signal and exports described audio identification processing module to;
Described audio identification processing module is according to described detection signal, described the first audio port being relatively attached thereto and the level of the second audio port, and the lower audio port of level is set to earth signal output.
Preferably, described audio frequency access state detection module comprises first input end, the second input, positive output end, earth terminal, the first diode, the second diode, the 3rd diode and the 4th diode;
Described first input end is connected with described the first audio port, and described the second input is connected with described the second audio port, and described positive output end, earth terminal are connected with described audio identification processing module;
The negative electrode of described the first diode is connected with described the second input, and the anode of described the first diode is connected with described earth terminal; The anode of described the second diode is connected with described the second input, and the negative electrode of described the second diode is connected with described positive output end; The negative electrode of described the 3rd diode is connected with described first input end, and the anode of described the 3rd diode is connected with described earth terminal; The anode of described the 4th diode is connected with described first input end, and the negative electrode of described the 4th diode is connected with described positive output end.
Preferably, described audio identification processing module comprises microcontroller, and described microcontroller comprises the first I/O port, the second I/O port, the 3rd I/O port and grounding pin; Described the first I/O port is connected with described the first audio port, and described the second I/O port is connected with described the second audio port, and described the 3rd I/O port is connected with described positive output end, and described grounding pin is connected with described earth terminal.
The audio port identification circuit the utility model proposes, the state of the audio interface detecting according to audio frequency access state detection module, generate corresponding detection signal and export audio identification processing module to, audio identification processing module is according to the detection signal receiving, the first audio port of the audio interface being relatively attached thereto and the level of the second audio port, and then identify the type of current accessed audio head, the audio port that level is lower is simultaneously set to earth signal output, make communication equipment and audio frequency apparatus altogether, realize communicating by letter of communication equipment and audio frequency apparatus.Audio port identification circuit of the present utility model, accesses the type of state detection module and audio identification processing module identification audio head by audio frequency, realize communicating by letter of audio frequency apparatus and communication equipment, has reduced design cost and the requirement of audio port identification circuit.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model audio port identification circuit preferred embodiment;
Fig. 2 is the electrical block diagram of the utility model audio port identification circuit preferred embodiment.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate the technical solution of the utility model.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model proposes a kind of audio port identification circuit.
With reference to Fig. 1, Fig. 1 is the theory diagram of the utility model audio port identification circuit preferred embodiment.
In the utility model preferred embodiment, audio port identification circuit 10 comprises audio interface 11, audio frequency access state detection module 12 and audio identification processing module 13, by audio interface 11, is connected with outside audio frequency apparatus 20; Audio interface 11 comprises the first audio port and the second audio port, (this first pin and the second pin are respectively microphone pin and the grounding pin of audio head 21 with the first pin of the audio head 21 of audio frequency apparatus 20 and the second pin respectively, or be respectively the grounding pin and microphone pin of audio head 21) be connected, audio frequency access state detection module 12 is connected with audio identification processing module 13 with audio interface 11 respectively, and audio identification processing module 13 is also connected with audio interface 11.
Audio frequency access state detection module 12, according to the state of the audio interface 11 detecting, generates corresponding detection signal, and exports audio identification processing module 13 to; Audio identification processing module 13 is according to this detection signal, the first audio port of comparing audio interface 11 and the level of the second audio port, and the lower audio port of level is set to earth signal output.
In the present embodiment, audio frequency access state detection module 12 detects the state of audio interface 11, and according to the state of the audio interface 11 detecting, generate corresponding detection signal, when audio frequency access state detection module 12 has detected audio head 21 accessing to audio interface 11, audio frequency access state detection module 12 generates the detection signal of high level; When audio frequency access state detection module 12 does not detect audio head 21 accessing to audio interface 11, audio frequency access state detection module 12 does not generate the detection signal of high level.Audio frequency access state detection module 12 exports the detection signal of generation to audio identification processing module 13, audio identification processing module 13 is when the detection signal receiving is high level signal, the first audio port of comparing audio interface 11 and the level of the second audio port, and then identify the type of current accessed audio head 21, the first pin or the second pin that determine the audio head 21 that the audio port lower with level be connected are the grounding pin of audio head 21, the first pin of the audio head 21 that the audio port higher with level is connected or the second pin are the microphone pin of audio head 21, and the audio port that level is lower is set to earth signal output, make communication equipment and audio frequency apparatus 20 altogether, realize communicating by letter of communication equipment and audio frequency apparatus 20.
With respect to prior art, audio port identification circuit 10 of the present utility model accesses state detection module 12 by audio frequency and audio identification processing module 13 completes the type identification to audio head 21, realize communicating by letter of audio frequency apparatus 20 and communication equipment, reduced design cost and the requirement of audio port identification circuit 10.
In conjunction with Fig. 1 and Fig. 2, wherein Fig. 2 is the electrical block diagram of the utility model audio port identification circuit preferred embodiment.
In the present embodiment, audio frequency access state detection module 12 comprises first input end A, the second input B, positive output end C, earth terminal D, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4.
First input end A is connected with the first audio port P1 of audio interface 11, and the second input B is connected with the second audio port P2 of audio interface 11, and positive output end C, earth terminal D are connected with audio identification processing module 13; The negative electrode of the first diode D1 is connected with the second input B, and the anode of the first diode D1 is connected with earth terminal D; The anode of the second diode D2 is connected with the second input B, and the negative electrode of the second diode D2 is connected with positive output end C; The negative electrode of the 3rd diode D3 is connected with first input end A, and the anode of the 3rd diode D3 is connected with earth terminal D; The anode of the 4th diode D4 is connected with first input end A, and the negative electrode of the 4th diode D4 is connected with positive output end C.
In the present embodiment, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 preferably select Schottky diode, and the conduction voltage drop of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 equates and is less than 0.3V.In addition, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 have unilateal conduction characteristic, and the conduction voltage drop under little current condition is less than the other types diode of 0.3V, as germanium diode.
Particularly, audio identification processing module 13 comprises microcontroller U1, and microcontroller U1 comprises the first I/O port I/O1, the second I/O port I/O2, the 3rd I/O port I/O3 and grounding pin GND.
The first I/O port I/O1 is connected with the first audio port P1 of audio interface 11, the second I/O port I/O2 is connected with the second audio port P2 of audio interface 11, the 3rd I/O port I/O3 is connected with positive output end C, and grounding pin GND is connected with earth terminal D.
Because the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 have unilateal conduction characteristic, therefore, the audio head 21 that no matter accessed is international standard or the audio head of national standard, the detection signal of the positive output end C output of audio frequency access state detection module 12 is high level, make audio identification processing module 13 according to the detection signal of this high level, judged audio head 21 accessing to audio interfaces 11.Conduction voltage drop due to the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 is less than 0.3V simultaneously, therefore, make the voltage on the grounding pin GND of microcontroller U1 can not surpass 0.3V, also be that voltage on the I/O port of microcontroller U1 can be lower than-0.3V, the I/O port of microcontroller U1 can not burnt, and microcontroller U1 can not burnt.
The operation principle of the utility model audio port identification circuit 10 specifically describes as follows:
When the audio interface 11 of the audio head 21 access communications equipment of audio frequency apparatus 20, if the audio head 21 of audio frequency apparatus 20 is international standards, as shown in Figure 2, what the first audio port P1 of audio interface 11 connected is the grounding pin of audio head 21, what the second audio port P2 of audio interface 11 connected is the microphone pin of audio head 21, due to the first diode D1, the second diode D2, the unilateral conduction of the 3rd diode D3 and the 4th diode D4, the electric current of the microphone pin of audio head 21 flow to the 3rd I/O port I/O3 of microcontroller U1 by the second diode D2, the electric current of the grounding pin GND of microcontroller U1 flow to the grounding pin of audio head 21 by the 3rd diode D3, now microcontroller U1 detects high level by the 3rd I/O port I/O3, if the audio head 21 of audio frequency apparatus 20 is national standards, as shown in Figure 2, what the first audio port P1 of audio interface 11 connected is the microphone pin of audio head 21, what the second audio port P2 of audio interface 11 connected is the grounding pin of audio head 21, unilateral conduction due to diode, the electric current of the microphone pin of audio head 21 flow to the 3rd I/O port I/O3 of microcontroller U1 by the 4th diode D4, the electric current of the grounding pin GND of microcontroller U1 flow to the grounding pin of audio head 21 by the first diode D1, now microcontroller U1 detects high level by the 3rd I/O port I/O3.Hence one can see that, no matter the audio head 21 of the audio frequency apparatus 20 accessing is the audio head of international standard, or the audio head of national standard, as long as the 3rd I/O port I/O3 of microcontroller U1 detects high level, microcontroller U1 has just been judged as audio frequency apparatus 20 accesses.Therefore, whether microcontroller U1 is high level by detecting the 3rd I/O port I/O3, has judged whether audio frequency apparatus 20 accesses.
When the audio head 21 of accessed audio frequency apparatus 20 is the audio head of international standard, due to the first diode D1, the second diode D2, itself there is pressure drop in the 3rd diode D3 and the 4th diode D4, the first diode D1 of the present embodiment, the second diode D2, the pressure drop of the 3rd diode D3 and the 4th diode D4 equates and is less than 0.3V, therefore according to little electric current, flow through the voltage characteristic of Schottky diode known, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, there is the pressure reduction that is less than 0.3V, now, microcontroller U1 is by the first I/O port I/O1, the second I/O port I/O2 is set to input state, by the first I/O port I/O1, the second I/O port I/O2 removes to judge the level of the first audio port P1 of audio interface 11 and the second audio port P2 of audio interface 11, what connect due to the second audio port P2 of audio interface 11 is the microphone pin of audio head 21, and the voltage on the microphone pin of audio head 21 is 1.8V, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, there is the pressure reduction that is less than 0.3V, therefore microcontroller U1 can detect the level that is greater than 1.5V and is less than 1.8V from the second I/O port I/O2, simultaneously, what connect due to the first audio port P1 of audio interface 11 is the grounding pin of audio head 21, and the voltage on the grounding pin of audio head 21 is 0V, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, there is the pressure reduction that is less than 0.3V, therefore the first I/O port I/O1 of microcontroller U1 can access the voltage (being generally-0.3～-0.2V) of be greater than-0.3V, thereby the first I/O port I/O1 belongs to low level, the second I/O port I/O2 belongs to high level, now microcontroller U1 is set to output state by the first I/O port I/O1, and export earth signal, the i.e. grounding pin GND conducting of the first I/O port I/O1 and microcontroller U1, also be the grounding pin GND conducting of grounding pin and the microcontroller U1 of audio head 21, audio frequency apparatus 20 and communication equipment are altogether, eliminated the pressure reduction of the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, thereby, can realize communicating by letter between audio frequency apparatus 20 and communication equipment.
When the audio head 21 of accessed audio frequency apparatus 20 is the audio head of national standard, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, there is the pressure reduction that is less than 0.3V, microcontroller U1 is by the first I/O port I/O1, the second I/O port I/O2 is set to input state, by the first I/O port I/O1, the second I/O port I/O2 removes to judge the level of the first audio port P1 of audio interface 11 and the second audio port P2 of audio interface 11, what connect due to the first audio port P1 of audio interface 11 now is the microphone pin of audio head 21, voltage on the microphone pin of audio head 21 is 1.8V, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, there is the pressure reduction that is less than 0.3V, therefore microcontroller U1 can detect the level that is greater than 1.5V and is less than 1.8V from the first I/O port I/O1 pin, what connect due to the second audio port P2 of audio interface 11 is the grounding pin of audio frequency apparatus 20, voltage on the grounding pin of audio head 21 is 0V, between the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, have the pressure reduction that is less than 0.3V, so the second I/O port I/O2 of microcontroller U1 can access the voltage (being generally-0.3～-0.2V) of be greater than-0.3V.Thereby the second I/O port I/O2 belongs to low level, the first I/O port I/O1 belongs to high level, now microcontroller U1 is set to output state by the second I/O port I/O2, and export earth signal, the i.e. grounding pin GND conducting of the second I/O port I/O2 and microcontroller U1, also be the grounding pin GND conducting of grounding pin and the microcontroller U1 of audio head 21, audio frequency apparatus 20 and communication equipment are altogether, eliminated the pressure reduction of the grounding pin GND of microcontroller U1 and the grounding pin of audio head 21, thereby, can realize communicating by letter between audio frequency apparatus 20 and communication equipment.
When audio frequency apparatus 20 disconnections are connected with communication equipment, microcontroller U1 does not detect the detection signal of high level by the 3rd I/O port I/O3.After microcontroller U1 detects audio frequency apparatus 20 and disconnects, the first I/O port I/O1, the second I/O port I/O2 are set to input state, wait for that audio frequency apparatus 20 accesses again.
The utility model also proposes a kind of communication equipment, and this communication equipment comprises audio port identification circuit 10, and the structure of this audio port identification circuit 10, operation principle and the beneficial effect that brings, all with reference to above-described embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. an audio port identification circuit, comprises audio interface, by described audio interface, is connected with outside audio frequency apparatus, it is characterized in that, also comprises audio frequency access state detection module and audio identification processing module;
Described audio interface comprises the first audio port and the second audio port, be connected with the second pin with the first pin of the audio head of audio frequency apparatus respectively, described audio frequency access state detection module is connected with described audio identification processing module with described audio interface respectively, and described audio identification processing module is also connected with described audio interface;
Described audio frequency access state detection module, according to the state of the audio interface detecting, generates corresponding detection signal and exports described audio identification processing module to;
Described audio identification processing module is according to described detection signal, described the first audio port being relatively attached thereto and the level of the second audio port, and the lower audio port of level is set to earth signal output.
2. audio port identification circuit as claimed in claim 1, it is characterized in that, described audio frequency access state detection module comprises first input end, the second input, positive output end, earth terminal, the first diode, the second diode, the 3rd diode and the 4th diode;
Described first input end is connected with described the first audio port, and described the second input is connected with described the second audio port, and described positive output end, earth terminal are connected with described audio identification processing module;
The negative electrode of described the first diode is connected with described the second input, and the anode of described the first diode is connected with described earth terminal; The anode of described the second diode is connected with described the second input, and the negative electrode of described the second diode is connected with described positive output end; The negative electrode of described the 3rd diode is connected with described first input end, and the anode of described the 3rd diode is connected with described earth terminal; The anode of described the 4th diode is connected with described first input end, and the negative electrode of described the 4th diode is connected with described positive output end.
3. audio port identification circuit as claimed in claim 2, is characterized in that, described audio identification processing module comprises microcontroller, and described microcontroller comprises the first I/O port, the second I/O port, the 3rd I/O port and grounding pin; Described the first I/O port is connected with described the first audio port, and described the second I/O port is connected with described the second audio port, and described the 3rd I/O port is connected with described positive output end, and described grounding pin is connected with described earth terminal.
4. a communication equipment, is characterized in that, comprises audio port identification circuit, and described audio port identification circuit comprises audio interface, by described audio interface, is connected with outside audio frequency apparatus, also comprises audio frequency access state detection module and audio identification processing module;
Described audio interface comprises the first audio port and the second audio port, be connected with the second pin with the first pin of the audio head of audio frequency apparatus respectively, described audio frequency access state detection module is connected with described audio identification processing module with described audio interface respectively, and described audio identification processing module is also connected with described audio interface;
Described audio frequency access state detection module, according to the state of the audio interface detecting, generates corresponding detection signal and exports described audio identification processing module to;
Described audio identification processing module is according to described detection signal, described the first audio port being relatively attached thereto and the level of the second audio port, and the lower audio port of level is set to earth signal output.
5. communication equipment as claimed in claim 4, is characterized in that, described audio frequency access state detection module comprises first input end, the second input, positive output end, earth terminal, the first diode, the second diode, the 3rd diode and the 4th diode;
Described first input end is connected with described the first audio port, and described the second input is connected with described the second audio port, and described positive output end, earth terminal are connected with described audio identification processing module;
The negative electrode of described the first diode is connected with described the second input, and the anode of described the first diode is connected with described earth terminal; The anode of described the second diode is connected with described the second input, and the negative electrode of described the second diode is connected with described positive output end; The negative electrode of described the 3rd diode is connected with described first input end, and the anode of described the 3rd diode is connected with described earth terminal; The anode of described the 4th diode is connected with described first input end, and the negative electrode of described the 4th diode is connected with described positive output end.
6. communication equipment as claimed in claim 5, is characterized in that, described audio identification processing module comprises microcontroller, and described microcontroller comprises the first I/O port, the second I/O port, the 3rd I/O port and grounding pin; Described the first I/O port is connected with described the first audio port, and described the second I/O port is connected with described the second audio port, and described the 3rd I/O port is connected with described positive output end, and described grounding pin is connected with described earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524509.7U CN203466962U (en) | 2013-08-26 | 2013-08-26 | Audio port identification circuit and communication device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524509.7U CN203466962U (en) | 2013-08-26 | 2013-08-26 | Audio port identification circuit and communication device |
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| CN203466962U true CN203466962U (en) | 2014-03-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442317A (en) * | 2013-08-26 | 2013-12-11 | 深圳市文鼎创数据科技有限公司 | Audio port identification circuit, audio port identification method and communication device |
| CN105262547A (en) * | 2015-10-30 | 2016-01-20 | 上海航天测控通信研究所 | Visible light communication reception method and device based on audio interface |
| CN109947684A (en) * | 2017-12-21 | 2019-06-28 | 西门子公司 | Identification circuit, pluggable submodule and its recognition methods |
-
2013
- 2013-08-26 CN CN201320524509.7U patent/CN203466962U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442317A (en) * | 2013-08-26 | 2013-12-11 | 深圳市文鼎创数据科技有限公司 | Audio port identification circuit, audio port identification method and communication device |
| CN105262547A (en) * | 2015-10-30 | 2016-01-20 | 上海航天测控通信研究所 | Visible light communication reception method and device based on audio interface |
| CN109947684A (en) * | 2017-12-21 | 2019-06-28 | 西门子公司 | Identification circuit, pluggable submodule and its recognition methods |
| CN109947684B (en) * | 2017-12-21 | 2023-08-29 | 西门子公司 | Identification circuit, pluggable submodule and identification method thereof |
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