Video output signal clamping circuit

Details Video output signal clamping circuit Video output signal clamping circuit

1986-05-29

1987-07-21

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358172, 358171, H04N 518

Patent

active

046822330

ABSTRACT:
In a wideband video signal processing system, a video signal is capacitively coupled to a kinescope via a signal path. A video signal clamping diode is coupled from the video signal path to a low impedance point in a feedback path of a keyed switching transistor. Parasitic capacitances associated with the clamping diode and with the output of the switching transistor are decoupled from the video signal path by means of a first decoupling resistor, and a second decoupling resistor included in the feedback path, respectively.

REFERENCES:
patent: 4082996 (1978-04-01), Hinn
patent: 4178610 (1979-12-01), Constable et al.
patent: 4285008 (1981-08-01), Osawa et al.
patent: 4442458 (1984-04-01), Barter
patent: 4549214 (1985-10-01), Hinn
Partial schematic diagram of Model DC-1 video monitor manufactured by RCA Corporation.
Partial schematic diagram of Model DC-3 video Monitor Manufactured by RCA Corporation.

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