Frequency discriminating circuit

Details Frequency discriminating circuit Frequency discriminating circuit

1991-12-04

1993-04-27

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328109, 328138, 328134, 377 47, H03K 906, H03K 300

Patent

active

052065499

ABSTRACT:
A frequency discriminating circuit suitable for use with a display capable of displaying image data of a plurality of signal formats and which has an oscillator for generating an oscillation frequency corresponding to a horizontal synchronizing frequency of an input signal which can be displayed. This frequency discriminating circuit includes a counter for frequency-dividing the oscillation frequency of the oscillator which is reset by a horizontal synchronizing signal, to thereby discriminate the horizontal synchronizing frequency of the input signal.

REFERENCES:
patent: 4360782 (1982-11-01), Nowell
patent: 4736162 (1988-04-01), Ishihara

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