Frequency discriminator of horizontal synchronizing signal for m

Details Frequency discriminator of horizontal synchronizing signal for m Frequency discriminator of horizontal synchronizing signal for m

1992-12-15

1994-11-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By frequency

327 3, 327 7, H03L 700, H03K 906

Patent

active

053672666

ABSTRACT:
A frequency discriminator of the horizontal synchronizing signal for a multi-mode monitor has a plurality of filter capacitors connected to horizontal synchronizing signal lines for rejecting noises of a direct current component of the horizontal synchronizing signal. The frequency discriminator also includes a plurality of phase comparator means respectively connected to the filter capacitors for comparing local oscillating frequencies set differently according to each mode with the inputted horizontal synchronizing signal to output one signal representative of the mode of the monitor.

REFERENCES:
patent: 3641445 (1972-02-01), Green
patent: 3805171 (1974-04-01), Drumheller
patent: 3812432 (1974-05-01), Hanson
patent: 4507578 (1985-03-01), Matsuda

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