Pseudo vertical synchronizing signal producing circuit

Details Pseudo vertical synchronizing signal producing circuit Pseudo vertical synchronizing signal producing circuit

1986-06-05

1988-02-16

Faber, Alan

Dynamic magnetic information storage or retrieval

Record editing

360 371, 360 331, 358335, H04N 593, H04N 5783

Patent

active

047258985

ABSTRACT:
A pseudo vertical synchronizing signal producing circuit produces a pseudo vertical synchronizing signal which is used instead of a regular vertical synchronizing signal of a video signal during a special reproduction mode of a helical scan type magnetic recording and/or reproducing apparatus. The pseudo vertical synchronizing signal producing circuit effectively utilizes a counter circuit for producing a pulse when a counted value therein reaches predetermined threshold values set therein, and employs a minimum number of monostable multivibrators and external variable resistors coupled thereto, so that the circuit can easily be manufactured in the form of an integrated circuit.

REFERENCES:
patent: Re31078 (1982-11-01), Segerstrom
patent: 3197559 (1965-07-01), Kihara
patent: 4293879 (1981-10-01), Heitmann
patent: 4509082 (1985-04-01), Kroner

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