Hearing aid made from monolithic integrated circuit

A monolithic integrated circuit and hearing aid technology, applied in hearing aids, transducer circuits, sensors, etc., can solve the problems of low working voltage and small crossover distortion

Inactive Publication Date: 2012-04-25
洪珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hearing aid has the characteristics of simple circuit structure, few peripheral components, small crossover distortion, good sound quality, low working voltage, low quiescent current and low power consumption, and output power can fully meet the requirements of hearing-impaired people. Hearing aids that solve or make up for some shortcomings in some hearing aids on the market

Method used

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  • Hearing aid made from monolithic integrated circuit
  • Hearing aid made from monolithic integrated circuit

Examples

Experimental program
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Embodiment Construction

[0011] According to attached figure 1 The present invention can be realized by implementing the circuit working principle diagram of the hearing aid made by the monolithic integrated circuit and the description of the drawings and the technical requirements of the components described below.

[0012] Component selection and technical parameters

[0013] IC1 is an integrated power amplifier circuit, the model is TDA2822, which has two types of packaging, TDA2822 is a 16-pin dual-in-line packaging structure, and TDA2822M is an 8-pin dual-in-line packaging structure. The internal circuits of the two are the same. Embodiments of the present invention The TDA2822M integrated circuit is used in the test; their difference is that the operating voltage range of TDA2822M can be from 3 to 15V, while the maximum operating voltage of TDA2822 integrated circuit cannot exceed 8V;

[0014] The silicon transistor BG1 uses 2SC9014 and other models, and the amplification factor of the silicon ...

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PUM

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Abstract

The invention relates to a hearing aid made from a monolithic integrated circuit. The hearing aid made from the monolithic integrated circuit consists of a 3V direct current power supply, a sound pickup circuit, an emitter follower, an audio signal regulating circuit and a bridge-tied-load (BTL) mode amplifying circuit, wherein the model of an integrated power amplifying circuit IC1 used in the BTL mode amplifying circuit is TDA2822M. The hearing aid made from the monolithic integrated circuit is combined by discrete elements and the integrated power amplifying circuit. The invention has the characteristics that: the hearing aid has a simple circuit structure, few peripheral elements, low cross distortion, high sound quality, low working voltage and low power consumption of quiescent current, the output power can completely meet the requirements of persons having hearing impairments, and the like, the hearing aid is a hearing aid which has high quality and low price, and the problems that some hearing aids have certain defects in the market and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of electronics and audio frequency amplification, and relates to a hearing aid made of a single-chip integrated circuit. Background technique [0002] Generally, hearing aids are designed and manufactured with dedicated integrated power amplifier circuits. There are many integrated circuit peripheral components in the circuit, and the circuit structure is relatively complicated. The TDA2822M integrated power amplifier circuit used in the hearing aid made by the monolithic integrated circuit of the present invention is commonly used in audio equipment such as Walkman, portable micro-recorder, computer audio for power amplification, and DVD; the integrated circuit has a high degree of integration High, less peripheral components, and wide operating voltage range, can still work normally when the voltage is lower than 1.8V, has the characteristics of small static current, low power consumption, and good sound q...

Claims

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Application Information

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IPC IPC(8): H04R25/00H04R3/00
Inventor 洪珍何林
Owner 洪珍
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