CMOS high impedance circuit

Details CMOS high impedance circuit CMOS high impedance circuit

2006-12-12

2006-12-12

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Having microphone

C381S120000

Reexamination Certificate

active

07149317

ABSTRACT:
A high impedance circuit includes a diode-connected MOSFET circuit. This circuit may be used in a buffer amplifier of a hearing aid microphone, coupled across an input of the buffer amplifier and providing a high input impedance.

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“A Set of Four IC's in CMOS Technology for a Programmable Hearing Aid,” Francois Callias, Francois H. Salchli, and Dominique Girard, IEEE Journal of Solid-State Circuits, vol. 24, No. 2, Apr. 1989, pp. 301-312.

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