Inductive interface circuits having ripple-reduction loops
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United States of America
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Dec 24, 2024
Grant Date -
May 2, 2024
app pub date -
Nov 2, 2022
filing date -
Nov 2, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
An amplifier circuits inductive/magnetic sensor interface can include a main signal path including one or more amplifiers configured to receive an input signal and to produce an output signal based on the input signal. The input signal may include a square-wave demodulated signal having an associated modulation frequency and an undesired frequency component at twice the modulation frequency of the square-wave demodulated signal. The amplifier circuit may include a gain feedback loop configured to set a gain of the amplifier circuit. The amplifier circuit may include a ripple reduction feedback loop configured to receive an intermediate signal on the main signal path and extract the undesired frequency component of the intermediate signal to produce a filtered version of the intermediate signal and provide the filtered version of the intermediate signal to the main signal path.
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