Method and circuit for correcting the offset of an amplification chain

Method and circuit for correcting the offset of an amplification chain

A circuit for correcting the offset of an amplification and filtering chain having a predetermined gain and cut-off frequency depending on the value of at least one capacitor, comprising: a correction means for subtracting from the chain input a correction signal depending on the value of a programm...

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Hauptverfasser: VAN ZANTEN FRANCOIS, RAVATIN JEAN
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Sprache:eng
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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creator VAN ZANTEN FRANCOIS
RAVATIN JEAN
description A circuit for correcting the offset of an amplification and filtering chain having a predetermined gain and cut-off frequency depending on the value of at least one capacitor, comprising: a correction means for subtracting from the chain input a correction signal depending on the value of a programmable digital word; a digital automaton for, in a setting phase, searching, then memorizing one of two consecutive values of the digital word between which the output signal of the chain switches sign, the input signal being canceled during a setting phase; and comprising a means for, during the setting phase, reducing the value of said at least one capacitor with respect to its normal operating value.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
title Method and circuit for correcting the offset of an amplification chain
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