CN101193373A - Audio control circuit for TD-SCDMA/GSM dual-mode mobile phone - Google Patents
Audio control circuit for TD-SCDMA/GSM dual-mode mobile phone Download PDFInfo
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- CN101193373A CN101193373A CNA200610149784XA CN200610149784A CN101193373A CN 101193373 A CN101193373 A CN 101193373A CN A200610149784X A CNA200610149784X A CN A200610149784XA CN 200610149784 A CN200610149784 A CN 200610149784A CN 101193373 A CN101193373 A CN 101193373A
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Abstract
The invention discloses an audio control circuit for a TD-SCDMA/GSM double-mode handset, which comprises a GSM module, a TD-SCDMA module, a two-channel analog switch and a microphone. The microphone is connected with the two-channel analog switch, the two-channel analog switch is respectively connected with the microphone receiving terminals of the GSM module and the TD-SCDMA module; of the GSM module and the TD-SCDMA module, one is a main control module and the other is a controlled module; the switching control terminal of the two-channel analog switch is connected with the signal terminal of the main control module, the switching control terminal is used for controlling the two-channel analog switch to choose to switch the GSM module or the TD-SCDMA module on ; when the main control module carries out the voice communication, the signal terminal sends a low-level signal; when the controlled module carries out the voice communication, the signal terminal sends a high-level signal.
Description
Technical field
The present invention relates to a kind of Mike's audio frequency control switching circuit, specifically, relate to a kind of TD-SCDMA/GSM dual-mode handset audio control circuit.
Background technology
At present, in the TD-SCDMA/GSM dual-mode handset,, consider that usually the method that adopts is to use two microphones in order to guarantee that TD-SCDMA and GSM can both carry out normal voice call.This method is that two microphones are connected with the microphone receiving end signal of GSM and TD-SCDMA module respectively on hardware, i.e. use the microphone that links to each other with gsm module during GSM conversation, uses the microphone that links to each other with the TD-SCDMA module during TD-SCDMA conversation.
TD-SCDMA/GSM dual-mode handset Mike audio frequency input circuit schematic diagram when Fig. 1 designs for available circuit.With reference to shown in Figure 1, the TD-SCDMA/GSM dual-mode handset respectively uses an independently microphone, and Mike's input channel of gsm module and TD-SCDMA module is independent mutually when carrying out speech communication.
The shortcoming that shows of said method is in actual applications: owing to use two microphones, when mobile phone need design than general handset structure when structural design and consider a microphone position, sometimes can relatively be difficult to processing owing to take into account appearance and modeling, on hardware circuit, many microphones can increase more audio frequency input cabling, because audio input signal is a weak signal, be easy to be subjected to the interference of other high-frequency signal and big current signal, thereby cause producing various noises in the process kind of conversation.
Summary of the invention
Technical problem solved by the invention provides a kind of TD-SCDMA/GSM dual-mode handset audio control circuit, has solved the problem that voice signal was vulnerable to disturb when hardware circuit increased audio input channel.
Technical scheme is as follows:
TD-SCDMA/GSM dual-mode handset audio control circuit, comprise gsm module, TD-SCDMA module, binary channels analog switch and microphone, described microphone is connected with the binary channels analog switch, and described binary channels analog switch is connected with Mike's receiving terminal of described gsm module and TD-SCDMA module respectively; In described gsm module and TD-SCDMA module, one is main control module, another is controlled module, the switching controls end of described binary channels analog switch links to each other with the signal end of main control module, described switching controls end is used to control the binary channels analog switch and selects conducting gsm module or TD-SCDMA module, and described signal end is used to indicate the operating state of gsm module or TD-SCDMA module; When described main control module carried out speech communication, signal end sent low level signal; When controlled module was carried out voice communication, signal end sent high level signal.
Preferably, described gsm module or TD-SCDMA module are used for the base band master chip universaling I/O port that the signal end of indicating operating status is gsm module or TD-SCDMA module.
Preferably, described binary channels analog switch is connected with the earth terminal of described gsm module with the TD-SCDMA module respectively.
Preferably, when using the TD-SCDMA module to carry out speech communication, the base band master chip universaling I/O port of GMS module is output as high level.
Preferably, when using gsm module to carry out speech communication, the base band master chip universaling I/O port of GMS module is output as low level.
Preferably, further, when using gsm module to carry out speech communication, the base band master chip universaling I/O port of gsm module is output as low level, the inner conducting of the pin of binary channels analog switch, with Mike's audio output and the conducting of gsm module Mike receiving terminal, the audio signal of microphone enters gsm module inside through the binary channels analog switch; Perhaps, when using the TD-SCDMA module to carry out speech communication, the base band master chip universaling I/O port of gsm module is output as high level, the inner conducting of the pin of binary channels analog switch, with Mike's audio output and the conducting of TD-SCDMA module Mike receiving terminal, the audio signal of microphone enters the TD-SCDMA inside modules through the binary channels analog switch.
Preferably, described microphone is the unique microphone of TD-SCDMA/GSM dual-mode handset.
Adopt circuit of the present invention, change the connected mode of Mike's voice-grade channel of binary channels analog switch by base band master chip universaling I/O port, only need microphone of configuration on cell phone mainboard, when guaranteeing normal GSM and the speech communication of TD-SCDMA module, reduce the difficulty of handset structure moulding effectively, and solved the problem that voice signal was vulnerable to disturb when hardware circuit increased audio input channel.
Description of drawings
Fig. 1 is the TD-SCDMA/GSM dual-mode handset Mike audio frequency input circuit schematic diagram in the existing technology;
Fig. 2 is a TD-SCDMA/GSM dual-mode handset audio control circuit schematic diagram of the present invention.
Embodiment
With reference to the accompanying drawings, the preferred embodiments of the present invention are described in detail.
Fig. 2 is a TD-SCDMA/GSM dual-mode handset audio control circuit schematic diagram of the present invention.
With reference to shown in Figure 2, by on circuit, increasing the method for a binary channels analog switch, a shared microphone in dual-mode handset.
In the present embodiment, the TD-SCDMA/GSM two-mode mobile phone system uses gsm module to be main control module, the TD-SCDMA module is controlled module, therefore be used to control that the binary channels analog switch switches the input of Mike's audio frequency mouthful is positioned at main control module gsm module side, promptly the base band master chip universaling I/O port GPIO1 of gsm module links to each other with the 8th pin with control end the 4th pin of binary channels analog switch.Mike's receiving terminal MIC IN of gsm module links to each other with the 7th pin with the 5th pin of binary channels analog switch respectively with MIC GND.Mike's receiving terminal MIC IN of controlled module TD-SCDMA module is connected with the 10th pin with the 2nd pin of binary channels analog switch respectively with MICGND.The MICIN end of microphone links to each other with the 3rd pin of binary channels analog switch, and the MIC GND end of microphone links to each other with the 9th pin of binary channels analog switch.
When using gsm module to carry out speech communication, the GPIO1 mouth is output as low level, at this moment, the inner conducting of the 3rd pin of binary channels analog switch and the 5th pin, the inner conducting of the 9th pin and the 7th pin, with Mike's receiving terminal conducting of Mike's audio output and gsm module, therefore, the audio signal of microphone enters gsm module inside through the binary channels analog switch.
When using the TD-SCDMA module to carry out speech communication, the GPIO1 mouth is output as high level, at this moment, the inner conducting of the 3rd pin of binary channels analog switch and the 2nd pin, the inner conducting of the 9th pin and the 10th pin, with Mike's receiving terminal conducting of Mike's audio output and TD-SCDMA module, at this moment, the audio signal of microphone enters the TD-SCDMA inside modules through the binary channels analog switch.
On the basis of the foregoing description, can also do various conversion, for example, setting the TD-SCDMA module is main control module, gsm module is controlled module.Switch the input of Mike's audio frequency with TD-SCDMA module controls binary channels analog switch, only need the GPIO1 mouth of TD-SCDMA module is linked to each other with the control end of binary channels analog switch.
Claims (7)
1. TD-SCDMA/GSM dual-mode handset audio control circuit, comprise gsm module, TD-SCDMA module, binary channels analog switch and microphone, it is characterized in that, described microphone is connected with the binary channels analog switch, and described binary channels analog switch is connected with Mike's receiving terminal of described gsm module and TD-SCDMA module respectively; In described gsm module and TD-SCDMA module, one is main control module, another is controlled module, the switching controls end of described binary channels analog switch links to each other with the signal end of main control module, described switching controls end is used to control the binary channels analog switch and selects conducting gsm module or TD-SCDMA module, and described signal end is used to indicate the operating state of gsm module or TD-SCDMA module; When described main control module carried out speech communication, signal end sent low level signal; When controlled module was carried out voice communication, signal end sent high level signal.
2. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1, it is characterized in that the signal end that described gsm module or TD-SCDMA module are used for indicating operating status is the base band master chip universaling I/O port of gsm module or TD-SCDMA module.
3. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1 is characterized in that, described binary channels analog switch is connected with the earth terminal of described gsm module with the TD-SCDMA module respectively.
4. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1 is characterized in that, when using the TD-SCDMA module to carry out speech communication, the base band master chip universaling I/O port of GMS module is output as high level.
5. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1 is characterized in that, when using gsm module to carry out speech communication, the base band master chip universaling I/O port of GMS module is output as low level.
6. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1, it is characterized in that, further, when using gsm module to carry out speech communication, the base band master chip universaling I/O port of gsm module is output as low level, the inner conducting of the pin of binary channels analog switch, with Mike's audio output and the conducting of gsm module Mike receiving terminal, the audio signal of microphone enters gsm module inside through the binary channels analog switch; Perhaps, when using the TD-SCDMA module to carry out speech communication, the base band master chip universaling I/O port of gsm module is output as high level, the inner conducting of the pin of binary channels analog switch, with Mike's audio output and the conducting of TD-SCDMA module Mike receiving terminal, the audio signal of microphone enters the TD-SCDMA inside modules through the binary channels analog switch.
7. TD-SCDMA/GSM dual-mode handset audio control circuit according to claim 1 is characterized in that, described microphone is the unique microphone of TD-SCDMA/GSM dual-mode handset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610149784XA CN101193373A (en) | 2006-11-27 | 2006-11-27 | Audio control circuit for TD-SCDMA/GSM dual-mode mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610149784XA CN101193373A (en) | 2006-11-27 | 2006-11-27 | Audio control circuit for TD-SCDMA/GSM dual-mode mobile phone |
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| Publication Number | Publication Date |
|---|---|
| CN101193373A true CN101193373A (en) | 2008-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610149784XA Withdrawn CN101193373A (en) | 2006-11-27 | 2006-11-27 | Audio control circuit for TD-SCDMA/GSM dual-mode mobile phone |
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| CN (1) | CN101193373A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103761A1 (en) * | 2014-01-09 | 2015-07-16 | 华为终端有限公司 | Cordless digital telephone main machine, cordless digital telephone and voice data transmission method |
| CN110399115A (en) * | 2019-08-14 | 2019-11-01 | 北京计算机技术及应用研究所 | A kind of anti-interference dual-channel audio voice switching device |
-
2006
- 2006-11-27 CN CNA200610149784XA patent/CN101193373A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103761A1 (en) * | 2014-01-09 | 2015-07-16 | 华为终端有限公司 | Cordless digital telephone main machine, cordless digital telephone and voice data transmission method |
| CN105684402A (en) * | 2014-01-09 | 2016-06-15 | 华为终端有限公司 | Cordless digital telephone main machine, cordless digital telephone and voice data transmission method |
| US9699293B2 (en) | 2014-01-09 | 2017-07-04 | Huawei Technologies Co., Ltd. | Base of cordless digital telephone set, cordless digital telephone set, and voice data transmitting method |
| CN110399115A (en) * | 2019-08-14 | 2019-11-01 | 北京计算机技术及应用研究所 | A kind of anti-interference dual-channel audio voice switching device |
| CN110399115B (en) * | 2019-08-14 | 2023-09-26 | 北京计算机技术及应用研究所 | Anti-interference double-channel audio frequency voice switching device |
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