Electronic hearing aid control circuit

Details Electronic hearing aid control circuit Electronic hearing aid control circuit

1983-03-30

1985-09-24

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 68, H03F 130

Patent

active

045434530

ABSTRACT:
An electronic power control circuit for a hearing aid amplifier. The circuit includes a feedback stage, output stage, and output transducer. The feedback and output stages cooperatively define a current regulator that controls the current of the output stage. A variable resistor is provided for adjusting the maximum signal level that can be applied to the output transducer in the hearing aid. Such adjustment prohibits the output transducer from producing an undesirably loud acoustic output. Adjustment of the variable resistor also simultaneously varies both the quiescent current of the output stage and the hearing aid gain.

REFERENCES:
patent: 3317671 (1967-05-01), Mitchell
patent: 3382321 (1968-05-01), Lybarger
patent: 3578913 (1971-05-01), Ufkes
patent: 3729588 (1973-04-01), Berland
patent: 3995114 (1976-11-01), Marschinke

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