Operational amplifier with programmable gain
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United States of America Patent
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-
Nov 30, 1982
Grant Date -
N/A
app pub date -
Jun 30, 1980
filing date -
Jun 30, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An operational amplifier includes a differential-input amplifier stage supplying first and second drive currents responsive to input signals applied to its input connections. A first current amplifier exhibiting gain factor G supplies currents to an output terminal responsive to the first drive current, and a second current amplifier exhibiting gain factor H supplies currents to that output terminal responsive to the second drive current. Each of the first and second current amplifiers includes means for switching the value of its respective gain factor G or H between a plurality of values responsive to a control signal, so the gain of the operational amplifier is programmable responsive to the control signal.
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