CN202077093U - Voice output device of mobile terminal - Google Patents
Voice output device of mobile terminal Download PDFInfo
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- CN202077093U CN202077093U CN2011201797287U CN201120179728U CN202077093U CN 202077093 U CN202077093 U CN 202077093U CN 2011201797287 U CN2011201797287 U CN 2011201797287U CN 201120179728 U CN201120179728 U CN 201120179728U CN 202077093 U CN202077093 U CN 202077093U
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Abstract
The utility model provides a voice output device of a mobile terminal. The output device includes a loudspeaker which can be used as a receiver, a signal processing module which is connected with the loudspeaker, and a baseband signal output module which is connected with the signal processing module. The baseband signal output module is used to output a receiver audio signal based on a received receiver mode signal, and to output a loudspeaker audio signal based on a received loudspeaker mode signal. The signal processing module is used to process and then output the receiver audio signal or the loudspeaker audio signal outputted from the baseband signal output module to the loudspeaker. The circuit of the voice output device is simplified, so the circuit layout of a mainboard is also simplified, and the cost is reduced.
Description
Technical field
The utility model relates to portable terminal, relates in particular to a kind of voice output of portable terminal.
Background technology
In the design of portable terminal, because along with popularizing and the requirement more and more littler of portable terminal to the volume of portable terminal, the mainboard volume of portable terminal also requires more and more littler, but the design circuit of mainboard is very complicated, various circuit are mixed in together, make that the power supply on the whole portable terminal mainboard is also more numerous and diverse, be easy to cause interference each other.And the voice output on the mainboard in the prior art, comprise two voice output parts of receiver and loud speaker, certainly exist the voice output drive circuit of two-way so, thereby make that circuit is complicated more on the mainboard, and then make that difficulty and cost increase more for wiring on the mainboard.
Summary of the invention
The utility model is for solving the problem that voice output circuit complexity in the prior art makes that wiring difficulty on the mainboard and cost increase, a kind of voice output of portable terminal is provided, this voice output circuit is oversimplified, and makes that the wiring on the mainboard is oversimplified and the cost reduction.
The utility model provides a kind of voice output of portable terminal, and described output device comprises the loud speaker that can be used as receiver, the signal processing module that is connected with loud speaker, and the baseband signal output module that is connected with signal processing module;
The baseband signal output module is used for according to the handset mode signal output receiver audio signal that gets access to, and according to the speaker mode signal output loudspeaker audio signal of obtaining;
Signal processing module exports described loud speaker to after being used for the receiver audio signal of baseband signal output module output or loudspeaker audio signal handled.
Further, described baseband signal output module comprises signal output unit, the signal gain processing unit that is connected with signal output unit, and the gain adjustment unit that is connected with the signal gain processing unit;
Gain adjustment unit is used for according to the handset mode signal or the speaker mode signal that get access to, the gain size of conditioning signal gain processing unit;
Signal output unit is used to export voice signal and ringing signal;
The signal gain processing unit is used for according to adjusted gain size, and the voice signal and the ringing signal of signal output unit carried out exporting signal processing module to after the gain process.
Further, described signal processing module comprises the signal magnification processing that is connected with the signal gain processing unit;
The signal magnification processing, be used for signal gain processing unit output receiver audio signal or loudspeaker audio signal carry out exporting described loud speaker to after power amplification is handled.
Further, described audio signal comprises voice signal and ringing signal.
Further, the signal magnification processing comprises power amplifier, the input negative pole end of described power amplifier is connected with first differential signal of voice signal and first differential signal of ringing signal respectively, the input positive terminal of described power amplifier is connected with second differential signal of voice signal and second differential signal of ringing signal respectively, the Enable Pin of described power amplifier is connected with the enable signal of voice signal and an end of the 5th resistance respectively, the other end ground connection of the 5th resistance, the bypass end of described power amplifier respectively with second differential signal of voice signal, second differential signal of ringing signal is connected with an end of the 9th resistance, the other end ground connection of the 9th resistance, first output of described power amplifier is connected with an end of the 3rd resistance, the other end of the 3rd resistance is connected with an end of loud speaker, second output of described power amplifier is connected with an end of the 4th resistance, and the other end of the 4th resistance is connected with the other end of loud speaker.
Further, described signal processing module also comprises four high pass filter unit, one end of first high pass filter unit and second high pass filter unit is connected with the input negative pole end of described power amplifier respectively, the other end of first high pass filter unit is connected with first differential signal of voice signal, the other end of second high pass filter unit is connected with first differential signal of ringing signal, one end of the 3rd high pass filter unit and the 4th high pass filter unit is connected respectively at the input positive terminal of described power amplifier, the other end of the 3rd high pass filter unit is connected with second differential signal of voice signal, the other end of the 4th high pass filter unit is connected with second differential signal of ringing signal, described signal processing module also comprises low-pass filter unit, the noise filter unit, power filter unit and by-pass unit, one end of described by-pass unit is connected with the bypass end of described power amplifier, the other end of described by-pass unit is connected with ground, one end of described power filter unit is connected with power supply, the other end of described power filter unit is connected with ground, between first output that the noise filter unit is connected described power amplifier and second output and the two ends of described noise filter unit are connected with ground respectively, one end of low-pass filter unit is connected with the input negative pole end of described power amplifier, and the other end of low-pass filter unit is connected with first output of described power amplifier.
Further, described high pass filter unit comprises the filter resistance that a filter capacitor and an end are connected with described filter capacitor, described low-pass filter unit comprises the 11 electric capacity and first resistance, one end of described the 11 electric capacity and first resistance is connected with the input negative pole end of described power amplifier respectively, and the other end of described the 11 electric capacity and first resistance is connected with first output of described power amplifier respectively; Described noise filter unit comprises the 8th electric capacity, the 9th electric capacity and the tenth electric capacity, one end of the tenth electric capacity is connected with ground, one end of the tenth electric capacity is connected with first output of described power amplifier and an end of the 8th electric capacity respectively, the other end of the 8th electric capacity is connected with second output of described power amplifier and an end of the 9th electric capacity respectively, and the other end of the 9th electric capacity is connected with ground; Described power filter unit is the 3rd electric capacity; Described by-pass unit is second electric capacity.
Further, described signal processing module comprises the antistatic unit, described antistatic unit comprises first piezo-resistance and second piezo-resistance, one end of described first piezo-resistance is connected with an end of described loud speaker, the other end of described first piezo-resistance is connected with ground, one end of described second piezo-resistance is connected with the other end of described loud speaker, and the other end of described second piezo-resistance is connected with ground.
The voice output that the utility model provides compared with prior art, can be used as receiver by loud speaker uses, baseband signal output module output receiver audio signal or loudspeaker audio signal, after the signal processing module processing, just can drive the handset function or the loudspeaker function of loud speaker, thereby realize the output of audio signal.Owing to just can export receiver audio signal or loudspeaker audio signal by the baseband signal output module, therefore do not need the two-way drive circuit just can realize handset function or loudspeaker function, thereby can simplify the circuit structure on the mainboard, make the wiring on the mainboard oversimplify, reduce the cost of manufacture of portable terminal simultaneously.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model voice output.
Fig. 2 is the structural representation of a kind of embodiment of the utility model baseband signal output module.
Fig. 3 is the circuit diagram of a kind of embodiment of the utility model signal processing module.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The invention provides the voice output of the portable terminal of a kind of embodiment, as shown in Figure 1, comprise the loud speaker 1 that can be used as receiver, the signal processing module 2 that is connected with loud speaker 1, and the baseband signal output module 3 that is connected with signal processing module 2;
Baseband signal output module 3 is used for according to the handset mode signal output receiver audio signal that gets access to, and according to the speaker mode signal output loudspeaker audio signal of obtaining;
From such scheme as can be seen, can be used as receiver by loud speaker 1 uses, baseband signal output module 3 output receiver audio signal or loudspeaker audio signal, after signal processing module 2 processing, just can drive the handset function or the loudspeaker function of loud speaker 1, thereby realize the output of audio signal.Owing to just can export receiver audio signal or loudspeaker audio signal by the baseband signal output module, therefore do not need the two-way drive circuit just can realize handset function or loudspeaker function, thereby can simplify the circuit structure on the mainboard, make the wiring on the mainboard oversimplify, reduce the cost of manufacture of portable terminal simultaneously.
In concrete enforcement, described baseband signal output module 3 comprises signal output unit 31, the signal gain processing unit 32 that is connected with signal output unit 31, and the gain adjustment unit 33 that is connected with signal gain processing unit 32;
Signal output unit 31 is used to export receiver audio signal or loudspeaker audio signal;
Gain adjustment unit 33 is used for according to the handset mode signal or the speaker mode signal that get access to, the gain size of conditioning signal gain processing unit 32;
Signal gain processing unit 32 is used for according to adjusted gain size the receiver audio signal or the loudspeaker audio signal of signal output unit 31 outputs being carried out exporting signal processing module 2 to after the gain process.
When the user need come output audio signal by receiver, gain adjustment unit 33 just receives the handset mode signal, and according to the handset mode signal that receives, the gain size adjustment of described signal gain processing unit 32 is arrived the gain that is fit to handset mode, pass through the audio signal of exporting after the processing of signal gain processing unit 32 so, just be fit to drive receiver, and when the user need come output audio signal by loud speaker, gain adjustment unit 33 just receives the speaker mode signal, and according to the speaker mode signal that receives, the gain size adjustment of described signal gain processing unit 32 is arrived the gain that is fit to speaker mode, the audio signal of exporting after the processing through signal gain processing unit 32 just is fit to drive described loud speaker 1 so.
In concrete enforcement, described signal processing module 2 comprises the signal magnification processing that is connected with signal gain processing unit 32;
The signal magnification processing, be used for signal gain processing unit 32 output receiver audio signal or loudspeaker audio signal carry out exporting described loud speaker 1 to after power amplification is handled.
In the present embodiment, above-mentioned signal magnification processing is with the power amplification of receiver audio signal or loudspeaker audio signal, so that drive described loud speaker 1.
In concrete enforcement, described receiver audio signal or loudspeaker audio signal comprise voice signal and ringing signal, and loud speaker 1 can be the voice signal and the ringing signal of output receiver, also export the voice signal and the ringing signal of loud speaker.
In concrete enforcement, as shown in Figure 3, the circuit diagram of 2 one kinds of embodiment of described signal processing module.Signal processing module 2 comprises power amplifier U1, the input negative pole end of described power amplifier U1 is connected with first differential signal M1 of voice signal and the first differential signal N1 of ringing signal respectively, the input positive terminal of described power amplifier U1 is connected with second differential signal M2 of voice signal and the second differential signal N2 of ringing signal respectively, the Enable Pin of described power amplifier U1 is connected with the enable signal of voice signal M0 and an end of resistance R 5 respectively, the other end ground connection of the 5th resistance R 5, the bypass end of described power amplifier U1 respectively with the second differential signal M2 of voice signal, the second differential signal N2 of ringing signal is connected with an end of the 9th resistance R 9, the other end ground connection of the 9th resistance R 9, first output of described power amplifier is connected with an end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 is connected with an end of loud speaker, second output of described power amplifier is connected with an end of the 4th resistance R 4, and the other end of the 4th resistance R 4 is connected with the other end of loud speaker.By the power amplification of described power amplifier U1 with audio signal, make the receiver audio signal of described signal gain processing unit 32 outputs can drive receiver, realize the handset function of loud speaker, the loudspeaker audio signal of perhaps described signal gain processing unit 32 outputs can drive loud speaker, realize himself loudspeaker function of loud speaker, and resistance R 3, R4 can make things convenient for the debugging of signal processing module 2 circuit.
In concrete enforcement, described signal processing module 2 also comprises four high pass filter unit, one end of first high pass filter unit and second high pass filter unit is connected with the input negative pole end of described power amplifier U1 respectively, the other end of first high pass filter unit is connected with the first differential signal M1 of voice signal, the other end of second high pass filter unit is connected with the first differential signal N1 of ringing signal, one end of the 3rd high pass filter unit and the 4th high pass filter unit is connected with the input positive terminal of described power amplifier U1 respectively, the other end of the 3rd high pass filter unit is connected with the second differential signal M2 of voice signal, the other end of the 4th high pass filter unit is connected with the second differential signal N2 of ringing signal, described signal processing module 2 also comprises low-pass filter unit, the noise filter unit, power filter unit and by-pass unit, one end of described by-pass unit is connected with the bypass end of described power amplifier, the other end of described by-pass unit is connected with ground, one end of described power filter unit is connected with power supply VBAT, the other end of described power filter unit is connected with ground, between first output that the noise filter unit is connected described power amplifier U1 and second output and the two ends of described noise filter unit are connected with ground respectively, one end of low-pass filter unit is connected with the input negative pole end of described power amplifier U1, and the other end of low-pass filter unit is connected with first output of described power amplifier U1.Wherein high pass filter unit is carried out filtering to the audio signal of described power amplifier U1, low-pass filter unit is used to make things convenient for the debugging of circuit, the power filter unit is used for power supply VBAT is carried out filtering, and the noise filter unit can differ from the filtering of membrane noise and common mode noise to the audio signal of described power amplifier U1 output.
In the present embodiment, described high pass filter unit comprises the filter resistance that a filter capacitor and an end are connected with described filter capacitor, wherein first high pass filter unit comprises the first filter capacitor C1 and the first filter resistance R2, the end of the first filter capacitor C1 is connected with the end of the first filter resistance R2, the other end of capacitor C 1 is connected with the first differential signal M1 of voice signal, the other end of the described first filter resistance R2 is connected with the input negative pole end of described power amplifier U1, second high pass filter unit comprises the second filter capacitor C4 and the second filter resistance R6, the end of the second filter capacitor C4 is connected with the end of the second filter resistance R6, the other end of the second filter capacitor C4 is connected with the first differential signal N1 of ringing signal, the other end of the described second filter resistance R6 is connected with the input negative pole end of described power amplifier, the 3rd high pass filter unit comprises the 3rd filter capacitor C5 and the 3rd filter resistance R7, the end of described the 3rd filter capacitor C5 is connected with the end of resistance the 3rd filtering R7, the other end of described electric capacity the 3rd filtering C5 is connected with the second differential signal M2 of voice signal, the other end of the 3rd filter resistance R7 is connected with the input positive terminal of described power amplifier U1, the 4th high pass filter unit comprises the 4th filter capacitor C6 and the 4th filter resistance R8, the end of described the 4th filter capacitor C6 is connected with the end of the 4th filter resistance R8, the other end of described the 4th filter capacitor C6 is connected with the second differential signal N2 of ringing signal, and the other end of the 4th filter resistance R8 is connected with the input positive terminal of described power amplifier U1; Described low-pass filter unit comprises the 11 capacitor C 11 and first resistance R 1, one end of described the 11 capacitor C 11 and first resistance R 1 is connected with the input negative pole end of described power amplifier U1 respectively, the other end of described the 11 capacitor C 11 and first resistance R 1 is connected with first output of described power amplifier U1 respectively, the noise filter unit comprises the 8th capacitor C 8, the 9th capacitor C 9 and the tenth capacitor C 10, one end of the tenth capacitor C 10 is connected with ground, the other end of the tenth capacitor C 10 is connected with first output of described power amplifier U1 and an end of eight capacitor C 8 respectively, the other end of eight capacitor C 8 is connected with second output of described power amplifier U1 and an end of the 9th capacitor C 9 respectively, the other end of the 9th capacitor C 9 is connected with ground, the power filter unit is specially the 3rd capacitor C 3, one end of described the 3rd capacitor C 3 is connected with power supply VBAT, the other end of described the 3rd capacitor C 3 is connected with ground, by-pass unit is specially second capacitor C 2, one end of described second capacitor C 2 is connected with the bypass end of described power amplifier U1, and the other end of described second capacitor C 2 is connected with ground.
Described signal processing module 3 also comprises the antistatic unit, described antistatic unit comprises the first piezo-resistance D1 and the second piezo-resistance D2, the end of the described first piezo-resistance D1 is connected with an end of described loud speaker 1, the other end of the described first piezo-resistance D1 is connected with ground, the end of the described second piezo-resistance D2 is connected with the other end of described loud speaker 1, and the other end of the described second piezo-resistance D2 is connected with ground.Described antistatic unit further TVS pipe (Transient Voltage Suppressor, Transient Voltage Suppressor) prevents the damage of static to loud speaker 1 and described power amplifier U1 by the TVS pipe.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
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Claims (8)
1. the voice output of a portable terminal, it is characterized in that: described output device comprises the loud speaker that can be used as receiver, the signal processing module that is connected with loud speaker, and the baseband signal output module that is connected with signal processing module;
The baseband signal output module is used for according to the handset mode signal output receiver audio signal that gets access to, and according to the speaker mode signal output loudspeaker audio signal of obtaining;
Signal processing module exports described loud speaker to after being used for the receiver audio signal of baseband signal output module output or loudspeaker audio signal handled.
2. device as claimed in claim 1 is characterized in that: described baseband signal output module comprises signal output unit, the signal gain processing unit that is connected with signal output unit, and the gain adjustment unit that is connected with the signal gain processing unit;
Signal output unit is used to export receiver audio signal or loudspeaker audio signal;
Gain adjustment unit is used for according to the handset mode signal or the speaker mode signal that get access to, the gain size of conditioning signal gain processing unit;
The signal gain processing unit is used for according to adjusted gain size the receiver audio signal or the loudspeaker audio signal of signal output unit output being carried out exporting signal processing module to after the gain process.
3. device as claimed in claim 2 is characterized in that: described signal processing module comprises the signal magnification processing that is connected with the signal gain processing unit;
The signal magnification processing, be used for signal gain processing unit output receiver audio signal or loudspeaker audio signal carry out exporting described loud speaker to after power amplification is handled.
4. device as claimed in claim 3 is characterized in that: described audio signal comprises voice signal and ringing signal.
5. device as claimed in claim 4, it is characterized in that: the signal magnification processing comprises power amplifier, the input negative pole end of described power amplifier is connected with first differential signal of voice signal and first differential signal of ringing signal respectively, the input positive terminal of described power amplifier is connected with second differential signal of voice signal and second differential signal of ringing signal respectively, the Enable Pin of described power amplifier is connected with the enable signal of voice signal and an end of the 5th resistance (R5) respectively, the other end ground connection of the 5th resistance (R5), the bypass end of described power amplifier respectively with second differential signal of voice signal, second differential signal of ringing signal is connected with an end of the 9th resistance (R9), the other end ground connection of the 9th resistance (R9), first output of described power amplifier is connected with an end of the 3rd resistance (R3), the other end of the 3rd resistance (R3) is connected with an end of loud speaker, second output of described power amplifier is connected with an end of the 4th resistance (R4), and the other end of the 4th resistance (R4) is connected with the other end of loud speaker.
6. device as claimed in claim 5, it is characterized in that: described signal processing module also comprises four high pass filter unit, one end of first high pass filter unit and second high pass filter unit is connected with the input negative pole end of described power amplifier respectively, the other end of first high pass filter unit is connected with first differential signal of voice signal, the other end of second high pass filter unit is connected with first differential signal of ringing signal, one end of the 3rd high pass filter unit and the 4th high pass filter unit is connected with the input positive terminal of described power amplifier respectively, the other end of the 3rd high pass filter unit is connected with second differential signal of voice signal, the other end of the 4th high pass filter unit is connected with second differential signal of ringing signal, described signal processing module also comprises low-pass filter unit, the noise filter unit, power filter unit and by-pass unit, one end of described by-pass unit is connected with the bypass end of described power amplifier, the other end of described by-pass unit is connected with ground, one end of described power filter unit is connected with power supply, the other end of described power filter unit is connected with ground, between first output that the noise filter unit is connected described power amplifier and second output and the two ends of described noise filter unit are connected with ground respectively, one end of low-pass filter unit is connected with the input negative pole end of described power amplifier, and the other end of low-pass filter unit is connected with first output of described power amplifier.
7. device as claimed in claim 6, it is characterized in that: described high pass filter unit comprises the filter resistance that a filter capacitor and an end are connected with described filter capacitor, described low-pass filter unit comprises the 11 electric capacity (C11) and first resistance (R1), one end of described the 11 electric capacity (C11) and first resistance (R1) is connected with the input negative pole end of described power amplifier respectively, and the other end of described the 11 electric capacity (C11) and first resistance (R1) is connected with first output of described power amplifier respectively; Described noise filter unit comprises the 8th electric capacity (C8), the 9th electric capacity (C9) and the tenth electric capacity (C10), one end of the tenth electric capacity (C10) is connected with ground, one end of the tenth electric capacity (C10) is connected with first output of described power amplifier and an end of the 8th electric capacity (C8) respectively, the other end of the 8th electric capacity (C8) is connected with second output of described power amplifier and an end of the 9th electric capacity (C9) respectively, and the other end of the 9th electric capacity (C9) is connected with ground; Described power filter unit is the 3rd electric capacity (C3); Described by-pass unit is second electric capacity (C2).
8. device as claimed in claim 6, it is characterized in that: described signal processing module also comprises the antistatic unit, described antistatic unit comprises first piezo-resistance (D1) and second piezo-resistance (D2), one end of described first piezo-resistance (D1) is connected with an end of described loud speaker, the other end of described first piezo-resistance (D1) is connected with ground, one end of described second piezo-resistance (D2) is connected with the other end of described loud speaker, and the other end of described second piezo-resistance (D2) is connected with ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201797287U CN202077093U (en) | 2011-05-31 | 2011-05-31 | Voice output device of mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201797287U CN202077093U (en) | 2011-05-31 | 2011-05-31 | Voice output device of mobile terminal |
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| Publication Number | Publication Date |
|---|---|
| CN202077093U true CN202077093U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201797287U Expired - Fee Related CN202077093U (en) | 2011-05-31 | 2011-05-31 | Voice output device of mobile terminal |
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| CN (1) | CN202077093U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792366A (en) * | 2016-11-23 | 2017-05-31 | 北京小米移动软件有限公司 | Audio output device and electronic equipment |
-
2011
- 2011-05-31 CN CN2011201797287U patent/CN202077093U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792366A (en) * | 2016-11-23 | 2017-05-31 | 北京小米移动软件有限公司 | Audio output device and electronic equipment |
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Granted publication date: 20111214 Termination date: 20160531 |