Clamping circuit for a television transmission system

Details Clamping circuit for a television transmission system Clamping circuit for a television transmission system

1988-02-02

1989-03-07

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, 358172, H04N 521

Patent

active

048110876

ABSTRACT:
A clamping circuit for a television transmission system, includes an input amplifier whose non-inverting input is connected to the input of the clamping circuit and whose output is connected to the output of the clamping circuit. A negative feedback loop is provided between the output of the clamping circuit and the inverting input of the input amplifier, the negative feedback loop including the series arrangement of a sample and hold circuit and two amplifiers functioning as integrators. A switchable filter switched by the same pulse which switches the sample and hold circuit is provided between the output of the clamping circuit and the signal input terminal of the sample and hold circuit.

REFERENCES:
patent: 4218706 (1980-08-01), Brinegar
patent: 4486781 (1984-12-01), Wilmer
patent: 4680624 (1987-07-01), Murakami
patent: 4689680 (1987-08-01), Bahrle

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