CN101715022A - Method for switching audio circuit of dual-mode and dual-standby mobile phone - Google Patents
Method for switching audio circuit of dual-mode and dual-standby mobile phone Download PDFInfo
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- CN101715022A CN101715022A CN200910188380A CN200910188380A CN101715022A CN 101715022 A CN101715022 A CN 101715022A CN 200910188380 A CN200910188380 A CN 200910188380A CN 200910188380 A CN200910188380 A CN 200910188380A CN 101715022 A CN101715022 A CN 101715022A
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Abstract
The invention provides a method for switching an audio circuit of a CSMA+GSM dual-mode and dual-standby mobile phone, and CDMA and GSM use the same audio peripheral. In the method, a baseband audio module and a CDMA audio module are connected with audio peripherals such as an audio power amplifier, a loudspeaker, a headphone, a microphone, an earphone module and the like through analog switches, and four-way analog switches are controlled by matching the pull-up and pull-down of an GPIO port of a baseband to complete the switching of the audio circuit between the GSM and the CDMA. Particularly, when the Bluetooth function is used for communication, because the CDMA module does not support PCM coding and decoding, the CDMA needs a Bluetooth module at the GSM end when communicating through the Bluetooth, an uplink connects a headphone circuit of the GSM and a microphone circuit of the FDMA, a downlink connects the headphone of the CDMA and the microphone of the GSM, and the GSM uses the cordless mode of the Bluetooth to complete the direct communication with the headphone and the microphone at the GSM end and performs the PCM coding and decoding so as to complete the Bluetooth communication of the CDMA. The method has the advantages that: three four-way analog switches are only used to complete the switching of the audio circuit of the dual-mode and dual-standby mobile phone, extra audio peripherals and Bluetooth modules are not required to be arranged, the problem of PCB layout is solved, and the hardware cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of changing method of CDMA+GSM audio circuit of dual-mode and dual-standby mobile phone, be meant the normal audio path of dual-mode handset when finishing conversation and the switching of Bluetooth audio frequency path.
Background technology
In recent years, mobile communication technology has obtained using widely, mobile communications network in usefulness comprises the GSM that belongs to the 2nd generation or the 2.5th generation, CDMA, PHS network and the CDMA2000 that belonged to for the 3rd generation, WCDMA, TD-SCDMA network etc., present single mode mobile phone, no matter be above any network, it all only is single accreditation card, but, extensive use along with mobile communication, the consumer begins to have two accreditation cards under the network, such as the consumer have one under the GSM network accreditation card and the accreditation card of a cdma network, at this moment, the consumer just need carry two mobile phone simultaneously, and the business people of the two places of particularly often going on business will cause like this and carry inconvenience and burden economically.In addition; increase day by day along with secret protection; the consumer can select different accreditation card standbies respectively in the different time; this moment, traditional single-mode dual-standby machine must need two mobile phone; increased consumer's financial burden again, so dual-mode and dual-idle mobile phone just is good at satisfying consumer's this demand, such as GSM/CDMA, GSM/PHS dual-mode and dual-idle mobile phone; in these dual-mode and dual-idle mobile phones, unified man-machine interface (MMI), two independent communication systems patterns are arranged all usually.
But existing double model double standby phone on the market substantially all is that two cover bluetooths add the audio frequency peripheral hardware and constitute with two cover baseband chips, so just cause PCB goods of furniture for display rather than for use difficulty, crowd on the space, might cause the electromagnetic interference of each device, also can cause the significantly increase of hardware cost simultaneously.
Summary of the invention
In sum, technical problem to be solved by this invention is how to overcome PCB goods of furniture for display rather than for use difficulty, and the increase of the crowded and hardware cost in space the invention provides a kind of changing method of audio circuit of dual-mode and dual-standby mobile phone for this reason.Use three four path analoging switch to finish the method for the switching of normal audio path and Bluetooth audio frequency path.Technical scheme of the present invention is as follows:
The changing method of audio circuit of dual-mode and dual-standby mobile phone is characterized in that baseband audio module is connected with audio frequency peripheral hardwares such as audio frequency power amplifier, loud speaker, receiver, microphone and earphone modules by analog switch with the CDMA audio-frequency module; Drawing high or dragging down to cooperate and control the voice-frequency channel that analog switch finishes between GSM and the CDMA and switch by base band GPIO mouth.The present invention mainly comprises baseband audio module, CDMA audio-frequency module, three four path analoging switch and audio frequency power amplifier, loud speaker (speaker), receiver (receiver), audio frequency peripheral hardwares such as microphone (microphone) and earphone module.Baseband audio module is connected with audio frequency peripheral hardwares such as audio frequency power amplifier, loud speaker, receiver, microphone and earphone modules by analog switch with the CDMA audio-frequency module; The drawing high of GPIO mouth by base band control chip (not drawing among the figure) drags down to cooperate and controls the voice-frequency channel that analog switch finishes between GSM and the CDMA and switch.Particularly when using the Bluetooth function conversation, because the CDMA module is not supported the PCM encoding and decoding, must be when so CDMA converses by bluetooth by the bluetooth module of GSM end, up link is connected the receiver path of GSM and the microphone path of CDMA, down link is connected the receiver of CDMA and the microphone of GSM, GSM uses wireless (cordless) pattern of bluetooth to finish with GSM and holds the straight-through of receiver and microphone, and carries out the PCM encoding and decoding, thereby finishes the bluetooth conversation of CDMA.
Advantage of the present invention is exactly only to use three four path analoging switch just can finish the switching of audio circuit of dual-mode and dual-standby mobile phone, and does not need to increase extra audio frequency peripheral hardware and bluetooth module, solves PCB goods of furniture for display rather than for use difficulty, has also reduced hardware cost greatly.
Description of drawings
Fig. 1 is the schematic diagram that GSM and CDMA voice-frequency channel switch.
Normal audio path schematic flow sheet when Fig. 2 is the GSM conversation.
Normal audio path schematic flow sheet when Fig. 3 is the CDMA conversation.
Bluetooth audio frequency path schematic flow sheet when Fig. 4 is the GSM conversation.
Bluetooth audio frequency path schematic flow sheet when Fig. 5 is the CDMA conversation.
Embodiment
Below in conjunction with Fig. 1～Fig. 5, describe concrete scheme of the present invention and execution mode in detail, make those skilled in the art be easier to understand processing procedure of the present invention and functional characteristics.
Fig. 1 is the schematic diagram that GSM and CDMA voice-frequency channel switch, and baseband audio module and CDMA audio-frequency module comprise loud speaker output among the figure, Receiver output, main microphone input and ear microphone input.Wherein loud speaker output power amplifier and earphone use same voice-frequency channel, will exports power amplifier at headset mode and close, and will exports power amplifier in speaker mode and open, two sound channels about wherein baseband audio module has, stereo during support MP3 broadcast; CDMA uses one tunnel output, only uses when earphone conversation and hand-free call, does not need to support stereo.
Four path analoging switch have eight input nS1, nS2 (n=1,2,3,4) and two control pin 1_2IN and 3_4IN, the selection of 1_2IN control 1S and 2S, the selection of 3_4IN control 3S and 4S is as 1_2IN, when 3_4IN draws high, nS1 and Dn are communicated with, and when dragging down, nS2 and Dn are communicated with.
When GSM converses, use the normal audio path, analog switch one is drawn high GPIO_PIN1, makes 1S1,2S1,4S1 respectively and D1, D2, D4 is communicated with, loud speaker, the earphone module switches to the GSM end; Analog switch two is drawn high GPIO_PIN2 and draw high GPIO_PIN3, makes 1S1,2S1 respectively and D1, D2 is communicated with, D3, the D4 path disconnects, receiver switches to GSM and holds like this; Analog switch three drags down GPIO_PIN2 and drags down GPIO_PIN3, make 1S2,2S2,3S2,4S2 respectively and D1, D2, D3, D4 is communicated with, at this moment main microphone just is connected with CDMA with GSM, at this moment because be the GSM conversation,, so just be unlikely to make the correspondent of CDMA also can hear sound so software is closed the bias voltage of the microphone of CDMA.
Use normal voice-frequency channel when CDMA conversation, analog switch one drags down GPIO_PIN1, makes 1S2,2S2,4S2 respectively and D1, D2, D4 is communicated with, and makes loud speaker, the earphone module switches to the CDMA end; Analog switch two drags down GPIO_PIN2 and drag down GPIO PIN3, makes 3S2,4S2 respectively and D3, D4 is communicated with, D1, the D2 path disconnects, receiver switches to CDMA and holds like this; Analog switch three drags down GPIO_PIN2 and drags down GPIO_PIN3, make 1S2,2S2,3S2,4S2 respectively and D1, D2, D3, D4 is communicated with, at this moment main microphone just is connected with CDMA with GSM, at this moment because be the CDMA conversation,, so just be unlikely to make the correspondent of GSM also can hear sound so software is closed the bias voltage of the microphone of GSM.
When the Bluetooth audio frequency path was used in the GSM conversation, the state of analog switch used normal audio path analog switch state identical with the GSM conversation, and it is just passable that software only need be set to bluetooth mode.
When the Bluetooth audio frequency path was used in CDMA conversation, analog switch one dragged down GPIO_PIN1, makes 1S2,2S2,4S2 respectively and D1, D2, D4 is communicated with, and makes loud speaker, the earphone module switches to the CDMA end; Analog switch two drags down GPIO_PIN2 and draws high GPIO_PIN3, makes D1, D2, and D3, the D4 path disconnects, and analog switch two disconnects fully like this, and receiver is invalid; Analog switch three is drawn high GPIO_PIN2 and is drawn high GPIO_PIN3, make 1S1,2S1,3S1,4S1 respectively and D1, D2, D3, D4 is communicated with, and at this moment the microphone of the receiver of CDMA module and GSM links to each other, and the microphone of CDMA module links to each other with the receiver of GSM, because the CDMA module is not supported the PCM encoding and decoding, can only use the PCM encoding and decoding of bluetooth module on the base band, the bluetooth module that bluetooth MIC output is passed to GSM with sound carries out the PCM decoding, and at this moment bluetooth module is set is wireless mode, data are passed to the receiver of GSM, because the receiver of GSM and the microphone of CDMA link to each other, the bluetooth that so just can finish CDMA is up, and CDMA receives that voice data gives the microphone of GSM equally, it is the cordless pattern that GSM is set, bluetooth module carries out pcm encoder to voice data and passes to bluetooth earphone, finishes the CDMA down link, so just can finish the bluetooth communication process of CDMA.
Normal audio path flow process when Fig. 2 is the GSM conversation, the GSM beginning of conversing, judge that whether CDMA is also in talking state, if then close the voltage bias of the microphone of CDMA, the GSM Headphone volume is set, if not the Headphone volume that GSM then directly is set, the voice-frequency channel when switching to the GSM normal talking then finishes.
Normal audio path flow process when Fig. 3 is the CDMA conversation, the GSM beginning of conversing, judge whether bluetooth earphone connects, if judge whether to be to use bluetooth conversation again,, be set to the bluetooth earphone pattern if also be then close the receiver of GSM, open the bluetooth receiver, enter GSM normal talking flow process then,, finish if not then directly entering GSM normal talking flow process.
Bluetooth audio frequency path flow process when Fig. 4 is the GSM conversation, the CDMA beginning of conversing, judge that whether GSM is also in talking state, if then close the voltage bias of the microphone of GSM, the volume of the receiver of CDMA is set, if not the volume that the receiver of CDMA then directly is set, the voice-frequency channel when switching to the CDMA normal talking then finishes.
Bluetooth audio frequency path flow process when Fig. 5 is the CDMA conversation, the CDMA beginning of conversing, judge whether bluetooth earphone connects, if judge whether to be to use bluetooth conversation again,, be set to the bluetooth wireless mode if also be then close the receiver of CDMA, open the bluetooth receiver, switch audio is a CDMA Bluetooth audio frequency channel status then, if not then directly entering CDMA normal talking flow process, finishes.
Claims (3)
1. the changing method of audio circuit of dual-mode and dual-standby mobile phone is characterized in that baseband audio module is connected with audio frequency peripheral hardwares such as audio frequency power amplifier, loud speaker, receiver, microphone and earphone modules by analog switch with the CDMA audio-frequency module; Drawing high or dragging down to cooperate and control the voice-frequency channel that analog switch finishes between GSM and the CDMA and switch by base band GPIO mouth.
2. the changing method of audio circuit of dual-mode and dual-standby mobile phone according to claim 1, it is characterized in that when using the Bluetooth function conversation, because the CDMA module is not supported the PCM encoding and decoding, must be by the bluetooth module of GSM end, up link is connected the receiver path of GSM and the microphone path of CDMA, down link is connected the receiver of CDMA and the microphone of GSM, GSM uses the wireless mode of bluetooth to finish with GSM and holds the straight-through of receiver and microphone, and carry out the PCM encoding and decoding, thereby finish the bluetooth conversation of CDMA.
3. the changing method of audio circuit of dual-mode and dual-standby mobile phone according to claim 1 is characterized in that only using three four path analoging switch just can finish the switching of audio circuit of dual-mode and dual-standby mobile phone, and does not need to increase extra audio frequency peripheral hardware and bluetooth module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910188380A CN101715022A (en) | 2009-11-03 | 2009-11-03 | Method for switching audio circuit of dual-mode and dual-standby mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910188380A CN101715022A (en) | 2009-11-03 | 2009-11-03 | Method for switching audio circuit of dual-mode and dual-standby mobile phone |
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| CN101715022A true CN101715022A (en) | 2010-05-26 |
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| CN200910188380A Pending CN101715022A (en) | 2009-11-03 | 2009-11-03 | Method for switching audio circuit of dual-mode and dual-standby mobile phone |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148897A (en) * | 2010-12-09 | 2011-08-10 | 中兴通讯股份有限公司 | Earphone detection method and multi-mode terminal |
| US20120163618A1 (en) * | 2010-12-27 | 2012-06-28 | Chi Mei Communication Systems, Inc. | Audio transmission system |
| CN102611468A (en) * | 2012-02-17 | 2012-07-25 | 中兴通讯股份有限公司 | Control method and device for antennas of mobile terminal and mobile terminal |
| CN103078992A (en) * | 2012-12-13 | 2013-05-01 | 陈梓铭 | Method and device for separating voice call in portable equipment |
| CN108933864A (en) * | 2018-06-29 | 2018-12-04 | 努比亚技术有限公司 | Intelligent glasses based reminding method, device and computer readable storage medium |
-
2009
- 2009-11-03 CN CN200910188380A patent/CN101715022A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148897A (en) * | 2010-12-09 | 2011-08-10 | 中兴通讯股份有限公司 | Earphone detection method and multi-mode terminal |
| WO2012075786A1 (en) * | 2010-12-09 | 2012-06-14 | 中兴通讯股份有限公司 | Method and multi-mode terminal for earphone detection |
| CN102148897B (en) * | 2010-12-09 | 2015-06-24 | 中兴通讯股份有限公司 | Earphone detection method and multi-mode terminal |
| US20120163618A1 (en) * | 2010-12-27 | 2012-06-28 | Chi Mei Communication Systems, Inc. | Audio transmission system |
| CN102611468A (en) * | 2012-02-17 | 2012-07-25 | 中兴通讯股份有限公司 | Control method and device for antennas of mobile terminal and mobile terminal |
| WO2013120311A1 (en) * | 2012-02-17 | 2013-08-22 | 中兴通讯股份有限公司 | Method and apparatus for controlling antenna of mobile terminal, and mobile terminal |
| CN103078992A (en) * | 2012-12-13 | 2013-05-01 | 陈梓铭 | Method and device for separating voice call in portable equipment |
| CN108933864A (en) * | 2018-06-29 | 2018-12-04 | 努比亚技术有限公司 | Intelligent glasses based reminding method, device and computer readable storage medium |
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Application publication date: 20100526 |