AMPLIFIER WITH ADAPTIVELY-CONTROLLED LOCAL FEEDBACK LOOP
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United States of America Patent
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Issued Date -
Jul 8, 2021
app pub date -
Apr 8, 2020
filing date -
Apr 8, 2020
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Abstract
In a general aspect, a circuit can include an input circuit configured to receive an input signal, and an amplifier circuit coupled with the input circuit. The amplifier circuit can include an amplifier, and first and second feedback paths. The first feedback path can be from a positive output to a negative input of the amplifier, and the second feedback path can be from a negative output to a positive input of the first amplifier. The circuit can also include a loop circuit configured to provide a local feedback loop for the first amplifier and configured to control current flow into the positive input of the first amplifier and current flow into the negative input of the first amplifier. The circuit can also include a control circuit that is configured to enable the loop circuit in response to a magnitude of the input signal exceeding a threshold.
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