Write clock pulse generator used for a time base corrector

Details Write clock pulse generator used for a time base corrector Write clock pulse generator used for a time base corrector

1985-07-24

1986-09-23

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 27, 358 19, 358319, 358326, 360 361, H03L 708, H04N 593

Patent

active

046138277

ABSTRACT:
A write clock pulse generator is disclosed, in which a horizontal synchronizing signal is separated from an input video signal and supplied to a PLL (phase locked loop) circuit to form a first clock with the frequency of nf.sub.H (n is an integer), a color burst signal is separated from the input video signal and used to drive a gate type variable oscillator to thereby form a second clock synchronized in phase with the color burst signal and whose average frequency is nf.sub.H, a difference between the pulse widths of the clocks resulting from counting down the first and second clocks to 1/M and the frequency of the variable oscillator is controlled by the compared output therebetween, whereby to produce a second clock synchronized in phase with the color burst signal and the frequency of which is n times the horizontal synchronizing signal.

REFERENCES:
patent: 4069499 (1978-01-01), Ninomiya
patent: 4120000 (1978-10-01), Ninomiya
patent: 4214262 (1980-07-01), Mizukami

Affiliated with

Also associated with

Rating

Write clock pulse generator used for a time base corrector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Write clock pulse generator used for a time base corrector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Write clock pulse generator used for a time base corrector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-768352