Current detection circuit
A current detection circuit (1) is provided with: an output circuit that outputs a signal indicating a drop in voltage between a pair of detection terminals (D1, D2); an amplification circuit (12) that amplifies a signal from the output circuit; an AD conversion circuit (13) that generates a digital...
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| Sprache: | chi ; eng |
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| Zusammenfassung: | A current detection circuit (1) is provided with: an output circuit that outputs a signal indicating a drop in voltage between a pair of detection terminals (D1, D2); an amplification circuit (12) that amplifies a signal from the output circuit; an AD conversion circuit (13) that generates a digital signal by sampling the amplified signal amplified by the amplification circuit (12) at a predetermined cycle; a filter circuit that extracts a noise component having a frequency higher than the sampling frequency of the AD conversion circuit (13) from the amplified signal amplified by the amplifier circuit (12); a comparison unit that outputs a comparison signal indicating a noise detection timing exceeding a predetermined reference value (Vref) for detecting a noise component in the output signal of the filter circuit; and an arithmetic circuit (16) that delays the timing at which the amplification signal is sampled by the AD conversion circuit (13) by a predetermined time on the basis of the comparison signal.
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