Line synchronizing circuit for a picture display device

Details Line synchronizing circuit for a picture display device Line synchronizing circuit for a picture display device

1985-01-16

1986-01-28

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358174, 331 20, H04N 700

Patent

active

045675228

ABSTRACT:
A line synchronizing circuit for a picture display device comprising a voltage-controlled oscillator for generating a signal whose frequency is higher than the line frequency, a frequency dividing circuit for dividing the frequency of the oscillator signals and a phase comparison stage for generating a control voltage in dependence on the phase deviation between the signals applied thereto, more specifically a received line synchronizing signal and a locally generated reference signal. The elements of the line phase control loop, are part of an integrated circuit which functions as a frequency synthesizing circuit. The reference-frequency dividing circuit incorporated in the integrated circuit is programmed to operate with a constant divisor.

REFERENCES:
patent: 3906155 (1975-09-01), van Straaten
patent: 4203076 (1980-05-01), Yamashita
patent: 4231064 (1980-10-01), Uchida
patent: 4389676 (1983-06-01), Balaban et al.
patent: 4393405 (1983-07-01), Ikeda
patent: 4396948 (1983-08-01), Fernsler et al.
"Versatile LSI Frequency Synthesizer System" by T. G. Giles; Electronic Components and Applications, vol. 2, No. 2, Feb. 1980, pp. 91-105.
Electronics Dictionary, Fourth Edition, McGraw-Hill Book Company, p. 10.

Affiliated with

Also associated with

Rating

Line synchronizing circuit for a picture display device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Line synchronizing circuit for a picture display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line synchronizing circuit for a picture display device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1309610