Clamping circuit for video signals

Details Clamping circuit for video signals Clamping circuit for video signals

2007-02-13

2007-02-13

Ometz, David (Department: 2622)

Television

Image signal processing circuitry specific to television

Dc insertion

C348S689000, C348S694000, C348S673000, C348S677000

Reexamination Certificate

active

10457654

ABSTRACT:
An apparatus, system and method for clamping a video signal input to a coupling capacitor (215) for providing a clamping voltage. A charging current is applied to the capacitor (215) via an amplifier (225) having a first input (227) coupled with the capacitor output and a second input (226) coupled to a reference potential, the amplifier (225) is responsive to the capacitor output signal and the reference potential for providing the charging current to the capacitor (215). The current has a linearly varying magnitude which is proportional to a difference between the capacitor output and the reference potential.

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