Dc current reduction circuit
AssigneeCanon Kabushiki Kaisha
InventorNaoki Isoda
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Abstract
A DC current reduction circuit of the present invention that reduces a DC component in an output current of a current output element in which an AC current and a DC current are superimposed includes a low-pass filter for extracting a current component of a frequency lower than a cutoff frequency from the output current and a reduction unit that reduces the extracted current component from the output current. The low-pass filter has a frequency changing unit that changes the cutoff frequency from higher to lower as a continuous function over time.
Claims7
A DC current reduction circuit that reduces a DC component in an output current of a current output element in which an AC current and a DC current are superimposed, comprising:
- a low-pass filter that extracts a current component of a frequency lower than a cutoff frequency from the output current;
- and
- a reduction unit that reduces the extracted current component from the output current,
- wherein the low-pass filter comprises a frequency changing unit that changes the cutoff frequency from higher to lower as a continuous function over time.
Dependencies are inferred from the claim text.