Class D hearing aid amplifier

Details Class D hearing aid amplifier Class D hearing aid amplifier

1983-12-08

1986-05-27

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

179107R, 179107E, 381117, 330251, H04R 300

Patent

active

045920877

ABSTRACT:
A subminiature power amplifier for hearing aids configured to be completely self-contained and fit within the user's ear features a Class D amplifier stage. By configuring all signal elements as digital units, circuit balance is readily maintained. A substantial economy of battery drain is achieved while preserving a low value of distortion at low signal levels. Oscillator frequency is governed by a single resistance element. The amplifier and an optional efficiency-improving inductor can be accommodated entirely within the residual volume of the motor chamber of a state-of-the-art earphone housing.

REFERENCES:
patent: 3995114 (1976-11-01), Marschinke
patent: 4068090 (1978-01-01), Komatsu
patent: 4471490 (1984-09-01), Bellafiore

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