Circuitry for reducing distortion over a wide frequency range

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United States of America Patent

PATENT NO 11689166
APP PUB NO 20220247369A1
SERIAL NO

17167838

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Abstract

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A combination amplifier can include a “main amplifier circuit” for signal amplification, and a matching “compensation amplifier circuit” to monitor distortion in the main amplifier output signal. The compensation amplifier circuit provides a compensation signal to the main amplifier circuit to compensate for and servo out distortion therein. The compensation amplifier circuit includes a passive input network and an amplifier. The passive input network can connect to both the input and output nodes of the main amplifier circuit such that the input and output signals cancel within the passive input network, leaving only the low level distortion component introduced in the main amplifier. Thus, the compensation amplifier is then only operating on the low-level distortion introduced in the main amplifier to generate the compensation signal. Because the compensation amplifier is then only operating on the very low distortion signal, any distortion it introduces into the compensation signal is negligible.

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Patent Owner(s)

  • ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hurrell, Christopher Peter Cookham, GB 44 425

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