Slow genlock circuit

Details Slow genlock circuit Slow genlock circuit

1982-09-13

1985-02-05

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358149, 358150, 358158, 358319, 331 20, 455208, 455260, 455265, 375120, H04N 504, H03L 700

Patent

active

044981031

ABSTRACT:
A genlock circuit has a reference signal that is frequency divided to provide an internal vertical sync signal. When an external sync signal is present, the division ratio is temporarily changed to provide a slow locking of the internal sync signal to the external sync signal. This avoids picture disturbances. The circuit can be used in a camera control unit and camera heads.

REFERENCES:
patent: 3935388 (1976-01-01), Brinkmann
patent: 4169659 (1979-10-01), Marlowe
patent: 4231064 (1980-10-01), Uchida
patent: 4253116 (1981-02-01), Rogers
patent: 4263609 (1981-04-01), Aschwanden
patent: 4358740 (1982-11-01), Dinter
patent: 4408349 (1983-10-01), Yukawa
patent: 4424497 (1984-01-01), Fellinger
RCA TG-2A Instruction Manual, Figure 2 and p. 14.

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