CMOS precision gain amplifier

Details CMOS precision gain amplifier CMOS precision gain amplifier

1987-05-29

1989-06-20

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330254, H03F 345

Patent

active

048412546

ABSTRACT:
A precision gain circuit arrangement for amplifying analog type signals is fabricated on an integrated chip with digital devices in a CMOS process. The circuit arrangement includes a high gain operational amplifier with a series connected pair of FET devices setting a reference voltage (V.sub.ref) at the inverting input of the operational amplifier and a feedback circuit including a parallel connected pair of FET devices and a biasing FET for said pair set the gain of said circuit arrangement.

REFERENCES:
Hoffman, "Self-Adjusting Bias Current Generator for IC Amplifier", IBM Technical Disclosure Bulletin, vol. 23, No. 7B, Dec. 1980, pp. 3330-3331.

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