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US 6,204,892 B1Granted
Circuit for clamping pedestal signal
AssigneeMatsubishi Denki Kabushiki Kaisha
InventorTsutomu Kawano
Life of this patent
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Abstract
A clamping circuit with a low-pass filter inserted in a feedback loop from an output terminal of a comparator to variable current sources for obtaining a feedback signal having only a DC component or having only a substantial portion of a DC component obtained by removing an AC component due to a burst signal from the output signal of the comparator.
Claims4
A clamping circuit for receiving an input signal consisting of a pedestal signal and a burst signal superimposed thereto and clamping a potential of a DC component of the input signal to a prespecified potential comprising:
- a feedback control unit for removing an AC component due to the burst signal to generate a feedback signal having only a DC component or having only a substantial portion of the DC component and controlling a potential of the DC component of the input signal according to the feedback signal.
Dependencies are inferred from the claim text.