Video signal peak compressor

Details Video signal peak compressor Video signal peak compressor

1992-12-30

1994-04-05

Groody, James J.

Television

Image signal processing circuitry specific to television

White limiter

H04N 514, H04N 520

Patent

active

053010248

ABSTRACT:
A video signal peak compressor circuit includes an emitter follower stage together with a feedback amplifier having a conduction threshold determined by a pair of voltage divider resistors. The feedback amplifier responds to increased conduction of the emitter follower stage to apply a compensating current to the emitter follower base and thereby impose a nonlinear compressing characteristic upon the emitter follower transfer function. In the embodiment shown, the emitter follower stage includes a PNP transistor having an input signal applied to its base and an output signal taken at its emitter which is coupled to operating supply by a pair of resistors. The feedback amplifier includes a PNP transistor having its emitter coupled to the junction point of a voltage divider, its base coupled to the junction of the emitter follower resistors and its collector coupled to the base of the PNP emitter follower stage.

REFERENCES:
patent: 4214272 (1980-07-01), Hapgood
patent: 4937670 (1990-06-01), Whitledge
patent: 5021885 (1991-06-01), Kim
patent: 5247360 (1993-09-01), Kawada et al.

Affiliated with

Also associated with

Rating

Video signal peak compressor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video signal peak compressor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal peak compressor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-515863