Horizontal scanning frequency multiplying circuit

Details Horizontal scanning frequency multiplying circuit Horizontal scanning frequency multiplying circuit

1983-05-02

1985-05-28

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358158, 358147, H04N 506, H04N 704, H04N 504

Patent

active

045203946

ABSTRACT:
A horizontal scanning frequency multiplying circuit comprises a flip-flop supplied with an input horizontal synchronizing signal having a horizontal scanning frequency f.sub.H of a television signal, a phase-locked-loop (PLL) for producing a signal having a frequency Nf.sub.H (N is an integer over 1), a first counter supplied with an output signal of a voltage controlled oscillator within the PLL as a clock signal, for producing a counted output every time the clock signal is counted for a predetermined counting time T1 and supplying this counted output to the flip-flop to reset the flip-flop, a second counter supplied with the output signal of the voltage controlled oscillator as a clock signal, for counting this clock signal, a counted value setting circuit for producing a high-level output according to an output of the second counter when the second counter counts for a predetermined counting time T2, where T2>T1, and an OR-gate supplied with the input horizontal synchronizing signal and an output signal of the counted value setting circuit. The OR-gate supplies its output to the flip-flop to set the flip-flop and supplies its output to the second counter to reset the second counter.

REFERENCES:
patent: 4170026 (1979-10-01), Nagaaka et al.
patent: 4476490 (1984-10-01), Kaneko

Affiliated with

Also associated with

Rating

Horizontal scanning frequency multiplying 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 Horizontal scanning frequency multiplying circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Horizontal scanning frequency multiplying circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-871507