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
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[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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