Circuit for switching video sources

Details Circuit for switching video sources Circuit for switching video sources

1988-08-18

1989-08-22

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5268

Patent

active

048601063

ABSTRACT:
A circuit for "fast" switching in television system when there are more than two video sources (1, 2, 3) to be switched simplifies the realization of the change-over switches (5, 6) by replacing one or a plurality of fast change-over switches by a slow change-over switch (6), which is possible if the control signal (7) of the slow change-over switch (6) is maintained during at least one field with the aid of a timing circuit (9).

REFERENCES:
patent: 3120652 (1964-02-01), Weighton et al.
patent: 3499982 (1970-03-01), O'Neal, Jr.
patent: 3793478 (1974-02-01), Verhoeven
patent: 4435728 (1984-03-01), Raven et al.
patent: 4479150 (1984-10-01), Ilmer et al.
patent: 4521803 (1985-06-01), Gittinger
patent: 4580163 (1986-04-01), Hartmeier

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