Amplifiers
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United States of America Patent
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Jun 12, 2018
Issued Date -
Oct 26, 2017
app pub date -
Apr 12, 2017
filing date -
Apr 22, 2016
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Abstract
A chopper amplifier and method of operation are described. The chopper amplifier comprises a first chopper arranged to modulate an input signal using a first chopper signal having a chopper frequency. An amplification stage has an input arranged to receive the chopped signal and an output, and supplies an amplified signal at the output. An output chopper is arranged to integrate the amplified signal using a second chopper signal having the chopper frequency to generate an amplified output signal. The amplification stage is further configured to filter the chopped signal to attenuate signal components having frequencies lower than the chopper frequency.
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