Selectable gain instrumentation amplifier

Details Selectable gain instrumentation amplifier Selectable gain instrumentation amplifier

1985-01-14

1986-07-08

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330 86, 330282, 330311, H03G 330, H03F 345

Patent

active

045995745

ABSTRACT:
A high accuracy selectable gain instrumentation amplifier system which avoids amplifying signal distortions produced by gain selection switches includes a high gain amplifier having an input coupled to receive a system input signal and a feedback signal and an output generating an output signal proportional to the difference therebetween, a feedback network providing a plurality of gain selection feedback paths to the amplifier input, a first switching network coupling the amplifier output to a selected feedback path and a second switching network coupling the selected feedback path to the system output. The amplifier system may be implemented in either a differential or single ended ground referenced configuration.

REFERENCES:
patent: 3500316 (1970-03-01), Brown
patent: 4016557 (1977-04-01), Zitelli et al.

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