Hearing aid device

Details Hearing aid device Hearing aid device

1996-04-23

1998-02-17

Mottola, Steven

Amplifiers

Modulator-demodulator-type amplifier

330251, 381 684, H03F 338, H04R 2500

Patent

active

057195285

ABSTRACT:
A hearing aid with a mechanical/electrical input converter and an electromechanical output transducer. The hearing aid includes a signal processing unit with an input operationally connected to the output of the input converter. The signal processing unit includes a switched output unit with a switch over control input. The signal processing unit is operationally connected to the input of the output transducer and generates an output signal switched between at least two predetermined signal levels. The signal processing unit further includes a pulse width modulator unit which generates a pulse width modulated output signal. The output of the pulse width modulator unit is operationally connected to the switch-over control input of the switched output unit. The pulse width modulator unit includes a digital control input for controlling pulse width modulation.

REFERENCES:
patent: 5247581 (1993-09-01), Gurcan
patent: 5389829 (1995-02-01), Milazzo

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