Circuit arrangement for a video recorder

Details Circuit arrangement for a video recorder Circuit arrangement for a video recorder

1986-06-05

1988-06-21

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358330, H04N 980

Patent

active

047528338

ABSTRACT:
A circuit arrangement for a video recorder comprises a modulator (5) for modulating a chrominance signal from a first onto a second carrier wave by means of a third carrier wave. In order to generate the third carrier wave a first mixer (39) is coupled to a reference oscillator (18) and to a first voltage-controlled oscillator (23). A control signal from a phase-comparator circuit (15), which compares the frequency and phase of the burst signal with these of the first oscillator signal, and a control signal from a phase-comparator circuit (30) of a phase-locked loop in which a second voltage-controlled oscillator (27) is synchronized with the line synchronizing pulses, are applied to the first voltage-controlled oscillator (23). The two voltage-controlled oscillators are substantially identical and have a fixed frequency ratio with each other.

REFERENCES:
patent: 4208674 (1980-06-01), Kuniyoshi et al.
patent: 4405937 (1983-09-01), Kudo et al.
patent: 4567507 (1986-01-01), Kusakabe et al.
patent: 4573086 (1986-02-01), Sakai et al.
Service Manual for VHS Recorder VR 6460/00, 3-10-1985, & 11-12-1984.

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