GAIN STAGE WITH OFFSET CANCELLATION CIRCUIT FOR A FIXED HIGH-PASS POLE

GAIN STAGE WITH OFFSET CANCELLATION CIRCUIT FOR A FIXED HIGH-PASS POLE

A gain stage includes an offset cancellation loop coupled to a first amplifier. The first amplifier has a first transfer function and a first gain, and the offset cancellation loop includes a second amplifier having a second transfer function and a second gain. The second transfer function is based...

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1. Verfasser: DELSHADPOUR, Siamak
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Sprache:eng ; fre ; ger
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
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creator DELSHADPOUR, Siamak
description A gain stage includes an offset cancellation loop coupled to a first amplifier. The first amplifier has a first transfer function and a first gain, and the offset cancellation loop includes a second amplifier having a second transfer function and a second gain. The second transfer function is based on an inverse of the first transfer function and the second gain based on an inverse of the first gain. When the offset cancellation loop feeds back an output signal of the first amplifier to an input of the first amplifier, a high-pass pole (or high-pass corner frequency) of the first amplifier is maintained at a constant level in spite of variations in the gain of the first amplifier. In one case, the second amplifier in the offset cancellation loop may be a simpler and lower power version of the first amplifier.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
title GAIN STAGE WITH OFFSET CANCELLATION CIRCUIT FOR A FIXED HIGH-PASS POLE
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