Variable gain amplifier

Details Variable gain amplifier Variable gain amplifier

1984-07-06

1985-01-15

Chin, Gary

Boots, shoes, and leggings

330278, 328168, G06F 1520

Patent

active

044942125

ABSTRACT:
A variable gain amplifier with digital output is described. The amplifier is useful for but not limited to input range selection in chart recorders or other measuring instruments. To minimize the number of expensive presision resistors used in the gain selection network each selected range is approximated by switching. A software routine then adjusts the gain after digitizing to the correct value for the selected range. Both range switching and gain correction are controlled by a general purpose microprocessor which also is available for other duties in the instrument.

REFERENCES:
patent: 4191995 (1980-03-01), Farrow
patent: 4213097 (1980-07-01), Chiu et al.
patent: 4270177 (1981-05-01), Endoh et al.
patent: 4301510 (1981-11-01), Ricciardi et al.
patent: 4356731 (1982-11-01), Mahony
patent: 4412182 (1983-10-01), Yochum

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