CN104660173A - Signal amplification circuit for use in voice recognition - Google Patents
Signal amplification circuit for use in voice recognition Download PDFInfo
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- CN104660173A CN104660173A CN201310585733.1A CN201310585733A CN104660173A CN 104660173 A CN104660173 A CN 104660173A CN 201310585733 A CN201310585733 A CN 201310585733A CN 104660173 A CN104660173 A CN 104660173A
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Abstract
The invention discloses a signal amplification circuit for use in voice recognition. The signal amplification circuit comprises an MC1590 amplifier, a first resistor to a tenth resistor, a first capacitor to a seventh capacitor, a first triode, a second triode, a diode, a potentiometer, an adjustable resistor and a power supply, wherein the first end of the third capacitor is the signal input end of the signal amplification circuit; the first end of the fourth capacitor is the signal output end of the signal amplification circuit; the second end of the third capacitor is connected with the first pin end of the MC1590 amplifier; the second pin end of the MC1590 amplifier is connected with the first end of the potentiometer and the sliding end of the potentiometer respectively; the second end of the potentiometer is connected with the emitter of the second triode and the first end of the sixth resistor; and the second end of the sixth resistor is grounded. Through adoption of the signal amplification circuit, the problems of complex circuit structure and high power consumption in most voice signal amplification circuits in the prior art are solved. The signal amplification circuit has popularization and use values.
Description
Technical field
The present invention relates to a kind of speech recognition device, particularly relate to a kind of signal amplification circuit for speech recognition.
Background technology
Before invention on computer, the imagination of automatic speech recognition has just been put on agenda, and early stage vocoder can be considered the blank of speech recognition and synthesis.And " RadioRex " toy dog that generation nineteen twenty produces is speech recognition device the earliest, when the name of this dog is called time, it can eject from base.The speech recognition system based on electronic computer is the earliest the Audrey speech recognition system developed by AT & T Bell Laboratory, and it can identify 10 English digitals.The formant in voice is followed the tracks of in its recognition methods.This system obtains the accuracy of 98%.To generation nineteen fifty end, gram probabilities adds in speech recognition by the Denes of London institute (ColledgeofLondon).
The most important breakthrough of speech recognition technology is the application of implicit Markov model HiddenMarkovModel.Propose relevant mathematical reasoning from Baum, through the research of the people such as Labiner, the Li Kaifu of Carnegie Mellon University finally achieves first large vocabulary speech recognition system Sphinx based on HMM.After this speech recognition technology does not depart from HMM framework strictly speaking.
Although researcher attempts " dictation machine " to promote for many years always, speech recognition technology also cannot support unlimited field at present, the dictation machine application of unlimited speaker.The application of speech recognition technology can be divided into two developing direction: a direction is large vocabulary Continuous Speech Recognition System, be mainly used in the dictation machine of computer, and the Speech information query and service system to combine with telephone network or the Internet, these systems realize all on a computer platform; The important developing direction of another one is application that is miniaturized, portable voice product, as the application of the aspect such as Voice command, intelligent toy, household remote of the dialing on wireless phone, automobile equipment, these application systems mostly use special hardware system to realize.
Can use signal amplification circuit in speech recognition device, the voice signal amplifying circuit of prior art also exists circuit structure more complicated and the larger problem of power consumption mostly.
Summary of the invention
Object of the present invention is just to provide a kind of signal amplification circuit for speech recognition to solve the problem.
In order to achieve the above object, present invention employs following technical scheme:
A kind of signal amplification circuit for speech recognition, comprise MC1590 type amplifier, first resistance is to the tenth resistance, first electric capacity is to the 7th electric capacity, first triode, second triode, diode, potentiometer, adjustable resistance and power supply, the first end of described 3rd electric capacity is the signal input part of described signal amplification circuit, the first end of described 4th electric capacity is the signal output part of described signal amplification circuit, second end of described 3rd electric capacity is connected with the first leads ends of described MC1590 type amplifier, second leads ends of described MC1590 type amplifier is connected with the first end of described potentiometer and the sliding end of described potentiometer respectively, second end of described potentiometer is connected with the emitter of described second triode and the first end of described 6th resistance respectively, second end ground connection of described 6th resistance, the collector electrode of described second triode is connected with the first cathode output end of described power supply, the base stage of described second triode respectively with the first end of described 7th resistance, the first end of described 8th resistance is connected with the first end of described 7th electric capacity, second end of described 7th resistance and the second end of described 7th electric capacity ground connection respectively, second end of described 8th resistance is connected with the negative pole of described diode, the positive pole of described diode is connected with the first end of described 9th resistance and the collector electrode of described first triode respectively, second end ground connection of described 9th resistance, the emitter of described first triode is connected with the first end of described 4th resistance, described second end of the 4th resistance is connected with the second cathode output end of described power supply, the base stage of described first triode respectively with the first end of described 5th resistance, the first end of described tenth resistance is connected with the first end of described 5th electric capacity, second end of described 5th resistance is connected with the 3rd cathode output end of described power supply, second end of described tenth resistance is connected with the first end of described adjustable resistance, second end ground connection of described adjustable resistance, second end of described 5th electric capacity is connected with the 5th leads ends of described MC1590 type amplifier and the first end of described second resistance respectively, 7th leads ends of described MC1590 type amplifier respectively with the 4th cathode output end of described power supply, the first end of described first electric capacity, the first end of described second electric capacity, the first end of described first resistance is connected with the first end of described second resistance, second end of described first electric capacity is connected rear ground connection with the second end of described second electric capacity, 6th leads ends of described MC1590 type amplifier is connected with the second end of described first resistance and the second end of described 4th electric capacity respectively, 3rd leads ends of described MC1590 type amplifier is connected with the first end of described 6th electric capacity, second end ground connection of described 6th electric capacity, 4th leads ends of described MC1590 type amplifier is connected with the first end of described 3rd resistance, second end of described 3rd resistance is connected rear ground connection with the 8th leads ends of described MC1590 type amplifier.
Beneficial effect of the present invention is:
The present invention is a kind of signal amplification circuit for speech recognition, and the voice signal amplifying circuit solving prior art also exists circuit structure more complicated and the larger problem of power consumption mostly, has the value promoted the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of signal amplification circuit for speech recognition of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention is a kind of signal amplification circuit for speech recognition, comprise MC1590 type amplifier IC, first resistance R1 is to the tenth resistance R10, first electric capacity C1 is to the 7th electric capacity C7, first triode VT1, second triode VT2, diode D, potentiometer RP, adjustable resistance RL and power supply, the first end of the 3rd electric capacity C3 is the signal input part of signal amplification circuit, the first end of the 4th electric capacity C4 is the signal output part of signal amplification circuit, second end of the 3rd electric capacity is connected with the first leads ends of MC1590 type amplifier, second leads ends of MC1590 type amplifier is connected with the first end of potentiometer RP and the sliding end of potentiometer RP respectively, second end of potentiometer RP is connected with the emitter of the second triode VT2 and the first end of the 6th resistance R6 respectively, the second end ground connection of the 6th resistance R6, the collector electrode of the second triode VT2 is connected with the first cathode output end of power supply, the base stage of the second triode VT2 respectively with the first end of the 7th resistance R7, the first end of the 8th resistance R8 is connected with the first end of the 7th electric capacity C7, second end of the 7th resistance R7 and second end of the 7th electric capacity C7 ground connection respectively, second end of the 8th resistance R8 is connected with the negative pole of diode D, the positive pole of diode D is connected with the first end of the 9th resistance R9 and the collector electrode of the first triode VT1 respectively, the second end ground connection of the 9th resistance R9, the emitter of the first triode VT1 is connected with the first end of the 4th resistance R4, second end of the 4th resistance R4 is connected with the second cathode output end of power supply, the base stage of the first triode VT1 respectively with the first end of the 5th resistance R5, the first end of the tenth resistance R10 is connected with the first end of the 5th electric capacity C5, second end of the 5th resistance R5 is connected with the 3rd cathode output end of power supply, second end of the tenth resistance R10 is connected with the first end of adjustable resistance RL, the second end ground connection of adjustable resistance RL, second end of the 5th electric capacity C5 is connected with the 5th leads ends of MC1590 type amplifier IC and the first end of the second resistance R2 respectively, 7th leads ends of MC1590 type amplifier IC respectively with the 4th cathode output end of power supply, the first end of the first electric capacity C1, the first end of the second electric capacity C2, the first end of the first resistance R1 is connected with the first end of the second resistance R2, second end of the first electric capacity C1 is connected rear ground connection with second end of the second electric capacity C2, 6th leads ends of MC1590 type amplifier IC is connected with second end of the first resistance R1 and second end of the 4th electric capacity C4 respectively, 3rd leads ends of MC1590 type amplifier IC is connected with the first end of the 6th electric capacity C6, the second end ground connection of the 6th electric capacity C6, 4th leads ends of MC1590 type amplifier IC is connected with the first end of the 3rd resistance R3, second end of the 3rd resistance R3 is connected rear ground connection with the 8th leads ends of MC1590 type amplifier IC.
Claims (1)
1. the signal amplification circuit for speech recognition, it is characterized in that: comprise MC1590 type amplifier, first resistance is to the tenth resistance, first electric capacity is to the 7th electric capacity, first triode, second triode, diode, potentiometer, adjustable resistance and power supply, the first end of described 3rd electric capacity is the signal input part of described signal amplification circuit, the first end of described 4th electric capacity is the signal output part of described signal amplification circuit, second end of described 3rd electric capacity is connected with the first leads ends of described MC1590 type amplifier, second leads ends of described MC1590 type amplifier is connected with the first end of described potentiometer and the sliding end of described potentiometer respectively, second end of described potentiometer is connected with the emitter of described second triode and the first end of described 6th resistance respectively, second end ground connection of described 6th resistance, the collector electrode of described second triode is connected with the first cathode output end of described power supply, the base stage of described second triode respectively with the first end of described 7th resistance, the first end of described 8th resistance is connected with the first end of described 7th electric capacity, second end of described 7th resistance and the second end of described 7th electric capacity ground connection respectively, second end of described 8th resistance is connected with the negative pole of described diode, the positive pole of described diode is connected with the first end of described 9th resistance and the collector electrode of described first triode respectively, second end ground connection of described 9th resistance, the emitter of described first triode is connected with the first end of described 4th resistance, described second end of the 4th resistance is connected with the second cathode output end of described power supply, the base stage of described first triode respectively with the first end of described 5th resistance, the first end of described tenth resistance is connected with the first end of described 5th electric capacity, second end of described 5th resistance is connected with the 3rd cathode output end of described power supply, second end of described tenth resistance is connected with the first end of described adjustable resistance, second end ground connection of described adjustable resistance, second end of described 5th electric capacity is connected with the 5th leads ends of described MC1590 type amplifier and the first end of described second resistance respectively, 7th leads ends of described MC1590 type amplifier respectively with the 4th cathode output end of described power supply, the first end of described first electric capacity, the first end of described second electric capacity, the first end of described first resistance is connected with the first end of described second resistance, second end of described first electric capacity is connected rear ground connection with the second end of described second electric capacity, 6th leads ends of described MC1590 type amplifier is connected with the second end of described first resistance and the second end of described 4th electric capacity respectively, 3rd leads ends of described MC1590 type amplifier is connected with the first end of described 6th electric capacity, second end ground connection of described 6th electric capacity, 4th leads ends of described MC1590 type amplifier is connected with the first end of described 3rd resistance, second end of described 3rd resistance is connected rear ground connection with the 8th leads ends of described MC1590 type amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310585733.1A CN104660173A (en) | 2013-11-20 | 2013-11-20 | Signal amplification circuit for use in voice recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310585733.1A CN104660173A (en) | 2013-11-20 | 2013-11-20 | Signal amplification circuit for use in voice recognition |
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| Publication Number | Publication Date |
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| CN104660173A true CN104660173A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310585733.1A Pending CN104660173A (en) | 2013-11-20 | 2013-11-20 | Signal amplification circuit for use in voice recognition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197112A (en) * | 2017-05-05 | 2017-09-22 | 苏州爱微礼网络科技有限公司 | Intelligent building intercom system |
| CN114614775A (en) * | 2022-03-21 | 2022-06-10 | 惠科股份有限公司 | Amplifying circuit and display panel |
-
2013
- 2013-11-20 CN CN201310585733.1A patent/CN104660173A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197112A (en) * | 2017-05-05 | 2017-09-22 | 苏州爱微礼网络科技有限公司 | Intelligent building intercom system |
| CN114614775A (en) * | 2022-03-21 | 2022-06-10 | 惠科股份有限公司 | Amplifying circuit and display panel |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
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| WD01 | Invention patent application deemed withdrawn after publication |