CN203504754U - Large power hearing aid circuit - Google Patents
Large power hearing aid circuit Download PDFInfo
- Publication number
- CN203504754U CN203504754U CN201320649299.4U CN201320649299U CN203504754U CN 203504754 U CN203504754 U CN 203504754U CN 201320649299 U CN201320649299 U CN 201320649299U CN 203504754 U CN203504754 U CN 203504754U
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- electric capacity
- capacitor
- amplification circuit
- binary channels
- power amplification
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Abstract
The utility model discloses a large power hearing aid circuit comprising a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a transformer, an electret microphone, a power supply, a potentiometer, a binary channel single sheet power amplification integrated circuit, a diode, a light emitting diode, a switch, and a power amplifier. A second end of the switch is connected with an anode of the power supply, and a first end of the switch is respectively connected with a first end of the first capacitor, a first end of the first resistor, a first end of a primary winding of the transformer, and a first end of the second capacitor. The large power hearing aid circuit is advantageous in that the electret microphone is connected with the high-gain drain electrode output circuit, and can be used to convert the external sound waves into the electric signals; the binary channel single sheet power amplification integrated circuit is integrated with the circuit amplification circuit, and can be used to amplify the audio signals input by the electret microphone, and therefore the enough power for driving the power amplifier to make sounds can be provided.
Description
Technical field
The utility model relates to a kind of hearing aid circuit, relates in particular to a kind of powerful hearing aid circuit.
Background technology
Hearing aids is one and contributes to hearing disabilities person to improve dysacousis, and then the equipment of raising and his conference communicative competence.The power output of present most of hearing aidss is all lower, and the individuals with disabilities of hearing moderate obstacle can not be used normally, and the voltage adaptation scope of most of hearing aidss is narrower simultaneously.
Utility model content
The purpose of this utility model provides a kind of powerful hearing aid circuit with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of powerful hearing aid circuit, comprise the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, transformer, Electret condenser microphone, power supply, potentiometer, binary channels monolithic power amplification circuit, diode, light-emitting diode, switch and amplifirer, the second end of described switch is connected with described positive source, the first end of described switch respectively with the first end of described the first electric capacity, the first end of described the first resistance, the first end of a winding of described transformer is connected with the first end of described the second electric capacity, the second end ground connection of described the first electric capacity, the second end of a winding of described transformer is connected with the second end of described the second electric capacity and the drain electrode of described Electret condenser microphone respectively, the negative pole of described power supply respectively with the source electrode of described Electret condenser microphone, the earth terminal of described Electret condenser microphone, the second end of described potentiometer, the second end of described the 5th electric capacity, the earth terminal of described binary channels monolithic power amplification circuit and the negative pole of described light-emitting diode are connected, the second end of described the first resistance respectively with the first end of described the 3rd electric capacity, the voltage input end of described binary channels monolithic power amplification circuit and the positive pole of described diode are connected, the second end ground connection of described the 3rd electric capacity, the negative pole of described diode is connected with the positive pole of described light-emitting diode, the first end of the secondary winding of described transformer is connected with the first end of described potentiometer, the second end of the secondary winding of described transformer is connected with the signal input part of the second power amplifier of described binary channels monolithic power amplification circuit, the sliding end of described potentiometer is connected with the negative feedback end of the first power amplifier of described binary channels monolithic power amplification circuit, the first end of described the 5th electric capacity is connected with the negative feedback end of the second power amplifier of described binary channels monolithic power amplification circuit with the second end of described the 4th electric capacity respectively, the first end of described the 4th electric capacity is connected with the signal input part of the first power amplifier of described binary channels monolithic power amplification circuit, the signal output part of the first power amplifier of described binary channels monolithic power amplification circuit is connected with the first end of described the second resistance and the first end of described amplifirer respectively, the signal output part of the second power amplifier of described binary channels monolithic power amplification circuit is connected with the second end of described the 6th electric capacity and the second end of described amplifirer respectively, the second end of described the second resistance is connected with the first end of described the 6th electric capacity.
The beneficial effects of the utility model are:
The powerful hearing aid circuit of the utility model, Electret condenser microphone connects into the drain electrode output circuit of high-gain, and convert extraneous sound wave to the signal of telecommunication, binary channels monolithic power amplification circuit power amplifier, audio signal to Electret condenser microphone input is amplified, and promotes amplifirer sounding with enough power.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the powerful hearing aid circuit of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the powerful hearing aid circuit of the utility model, comprise the first resistance R 1, the second resistance R 2, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, transformer T, Electret condenser microphone MIC, power supply E, potentiometer RP, binary channels monolithic power amplification circuit IC, diode D, LED, switch S and amplifirer BL, the second end of switch S is connected with power supply E is anodal, the first end of switch S respectively with the first end of the first capacitor C 1, the first end of the first resistance R 1, the first end of a winding of transformer T is connected with the first end of the second capacitor C 2, the second end ground connection of the first capacitor C 1, the second end of a winding of transformer T is connected with the drain electrode of Electret condenser microphone MIC with the second end of the second capacitor C 2 respectively, the negative pole of power supply E respectively with the source electrode of Electret condenser microphone MIC, the earth terminal of Electret condenser microphone MIC, the second end of potentiometer RP, the second end of the 5th capacitor C 5, the earth terminal of binary channels monolithic power amplification circuit IC and the negative pole of LED are connected, the second end of the first resistance R 1 respectively with the first end of the 3rd capacitor C 3, the voltage input end of binary channels monolithic power amplification circuit IC is connected with the positive pole of diode D, the second end ground connection of the 3rd capacitor C 3, the negative pole of diode D is connected with the positive pole of LED, the first end of the secondary winding of transformer T is connected with the first end of potentiometer RP, the second end of the secondary winding of transformer T is connected with the signal input part of the second power amplifier of binary channels monolithic power amplification circuit IC, the sliding end of potentiometer RP is connected with the negative feedback end of the first power amplifier of binary channels monolithic power amplification circuit IC, the first end of the 5th capacitor C 5 is connected with the negative feedback end of the second power amplifier of binary channels monolithic power amplification circuit IC with the second end of the 4th capacitor C 4 respectively, the first end of the 4th capacitor C 4 is connected with the signal input part of the first power amplifier of binary channels monolithic power amplification circuit IC, the signal output part of the first power amplifier of binary channels monolithic power amplification circuit IC is connected with the first end of amplifirer BL with the first end of the second resistance R 2 respectively, the signal output part of the second power amplifier of binary channels monolithic power amplification circuit IC is connected with the second end of the 6th capacitor C 6 and the second end of amplifirer BL respectively, the second end of the second resistance R 2 is connected with the first end of the 6th capacitor C 6.
The operation principle of the powerful hearing aid circuit of the utility model is as follows:
Electret condenser microphone MIC connects into the drain electrode output circuit of high-gain, and converts extraneous sound wave to the signal of telecommunication.Binary channels monolithic power amplification circuit IC forms power amplifier, the audio signal of Electret condenser microphone MIC input is amplified, and promote amplifirer BL sounding with enough power.The loss causing in order to reduce coupling, in winding of transformer T two termination the second capacitor C 2, can a filtering part respond to noise, and secondary winding is connected with potentiometer RP, to control volume.Another the first resistance R 1 and the second capacitor C 2 form decoupling circuits, in case stop signal causes feedback by power supply E, the second resistance R 2 and the 6th capacitor C 6 compensate for the frequency of power amplifier.
Claims (1)
1. a powerful hearing aid circuit, it is characterized in that: comprise the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, transformer, Electret condenser microphone, power supply, potentiometer, binary channels monolithic power amplification circuit, diode, light-emitting diode, switch and amplifirer, the second end of described switch is connected with described positive source, the first end of described switch respectively with the first end of described the first electric capacity, the first end of described the first resistance, the first end of a winding of described transformer is connected with the first end of described the second electric capacity, the second end ground connection of described the first electric capacity, the second end of a winding of described transformer is connected with the second end of described the second electric capacity and the drain electrode of described Electret condenser microphone respectively, the negative pole of described power supply respectively with the source electrode of described Electret condenser microphone, the earth terminal of described Electret condenser microphone, the second end of described potentiometer, the second end of described the 5th electric capacity, the earth terminal of described binary channels monolithic power amplification circuit and the negative pole of described light-emitting diode are connected, the second end of described the first resistance respectively with the first end of described the 3rd electric capacity, the voltage input end of described binary channels monolithic power amplification circuit and the positive pole of described diode are connected, the second end ground connection of described the 3rd electric capacity, the negative pole of described diode is connected with the positive pole of described light-emitting diode, the first end of the secondary winding of described transformer is connected with the first end of described potentiometer, the second end of the secondary winding of described transformer is connected with the signal input part of the second power amplifier of described binary channels monolithic power amplification circuit, the sliding end of described potentiometer is connected with the negative feedback end of the first power amplifier of described binary channels monolithic power amplification circuit, the first end of described the 5th electric capacity is connected with the negative feedback end of the second power amplifier of described binary channels monolithic power amplification circuit with the second end of described the 4th electric capacity respectively, the first end of described the 4th electric capacity is connected with the signal input part of the first power amplifier of described binary channels monolithic power amplification circuit, the signal output part of the first power amplifier of described binary channels monolithic power amplification circuit is connected with the first end of described the second resistance and the first end of described amplifirer respectively, the signal output part of the second power amplifier of described binary channels monolithic power amplification circuit is connected with the second end of described the 6th electric capacity and the second end of described amplifirer respectively, the second end of described the second resistance is connected with the first end of described the 6th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320649299.4U CN203504754U (en) | 2013-10-21 | 2013-10-21 | Large power hearing aid circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320649299.4U CN203504754U (en) | 2013-10-21 | 2013-10-21 | Large power hearing aid circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504754U true CN203504754U (en) | 2014-03-26 |
Family
ID=50335691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320649299.4U Expired - Fee Related CN203504754U (en) | 2013-10-21 | 2013-10-21 | Large power hearing aid circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504754U (en) |
-
2013
- 2013-10-21 CN CN201320649299.4U patent/CN203504754U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141021 |
|
| EXPY | Termination of patent right or utility model |