Color video signal reproducing circuit for index type television

Details Color video signal reproducing circuit for index type television Color video signal reproducing circuit for index type television

1983-12-19

1986-12-02

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 69, 315 121, H04N 924, H01J 2941

Patent

active

046269002

ABSTRACT:
A color video signal reproducing circuit for an index type television including a phase detector and a phase adjusting circuit in which the phase detector detects the phase difference between an index signal of a present time and an index signal which is one horizontal scanning period prior to the present time in a range within 360.degree. of phase, the phase detector then outputs a phase control signal which is indicative of the phase difference, and a phase adjustment circuit receives the present index signal and changes the phase of the input index signal corresponding to the phase control signal of the phase detector so as to output a new index signal for driving the index type television. The phase of the new index signal is corrected so as to comply with the color video signal having a different horizontal scanning frequency.

REFERENCES:
patent: 3328516 (1967-06-01), Usami et al.
patent: 3691475 (1972-09-01), Mouri et al.
patent: 3786179 (1974-01-01), Mouri et al.
patent: 4183053 (1980-01-01), Tomii et al.
patent: 4408223 (1983-10-01), Midland
Macwhirter, Ian, "Beam Indexing Tubes", Wireless World, Feb. 1961. pp. 92-98.

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