High speed instrumentation amplifier with minimized offset volta

Details High speed instrumentation amplifier with minimized offset volta High speed instrumentation amplifier with minimized offset volta

1988-04-12

1989-05-09

Mullins, James B.

Amplifiers

With periodic switching input-output

330 51, 330124R, 330295, H03F 102, H03F 368

Patent

active

048292630

ABSTRACT:
The instrumentation amplifier with minimized offset voltage and drift has a very high speed and accuracy. One voltage controlled amplifier operating under open loop condition is interchangeably amplifying the input signal and providing the output signal. Simultaneously, a comparator circuit is automatically correcting the gain and error voltage of another voltage controlled amplifier by adjusting voltages across two capacitors coupled thereto. The accuracy of a reference source, passive components and on-resistance of switches is not essential. Amplifiers with FET input stages and an output buffer amplifier can be employed. The gain of the instrumentation amplifier is set by a voltage or digitally.

REFERENCES:
patent: 4596956 (1986-06-01), Gardner

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