CURRENT DETECTION CIRCUIT
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United States of America Patent
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Issued Date -
Aug 1, 2024
app pub date -
Jan 31, 2024
filing date -
Jan 31, 2023
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Abstract
A current detection circuit, including: an output circuit to output a signal indicating a voltage drop between a pair of detection terminals; an amplifier circuit to amplify the signal from the output circuit; an AD conversion circuit to generate a digital signal by sampling, at a predetermined cycle, an amplified signal amplified by the amplifier circuit; a filter circuit configured to extract, from the amplified signal amplified by the amplifier circuit, a noise component having a frequency higher than a sampling frequency of the AD conversion circuit; a comparing unit to output a comparison signal indicating a noise detection timing at which an output signal of the filter circuit exceeds a predetermined reference value for detecting the noise component; and an arithmetic circuit to delay a timing at which the amplified signal is sampled by the AD conversion circuit for a predetermined time based on the comparison signal.
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