Synchronization and gain control circuit

Details Synchronization and gain control circuit Synchronization and gain control circuit

H - Electricity

04

N

350/81

H04N 5/04 (2006.01) H04N 5/213 (2006.01) H04N 5/53 (2006.01)

Patent

CA 1130914

RCA 71,594 Abstract A circuit is provided for developing a television synchronization signal and an automatic gain control (AGC) signal. A composite video signal is coupled to the input of a D.C. threshold noise inverter which inverts impulse noise above a predetermined threshold level. The inverted noise signal and a delayed video signal are coupled to a peak detecting sync separator which generates a noise-free sync signal. The noise-free sync signal is coupled to a latching circuit, where it is combined with a horizontal retrace (flyback) signal to produce an AGC keying signal of constant pulse width. An AGC circuit is keyed by the AGC keying signal to generate an AGC control signal from the composite video signal. The time constant of the peak detecting sync separator performs the dual functions of tracking the sync signal of the composite video signal and preventing lockout of the keyed AGC circuit.

333258

Affiliated with

Also associated with

Rating

Synchronization and gain control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synchronization and gain control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization and gain control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-947015