Digital timing discriminator

Details Digital timing discriminator Digital timing discriminator

1992-01-10

1993-01-19

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307526, 307528, 328134, 328141, 377 39, H03K 906, H03D 302

Patent

active

051809354

ABSTRACT:
A frequency discriminator circuit is provided having increased resolution for detecting the frequency of a data input signal above and below a predetermined frequency threshold by monitoring a count value. The output signal of the frequency discriminator circuit remains at a first logic state provided the count value is reset by the data input signal before reaching a predetermined count value signifying that the frequency of data input signal is above the predetermined frequency threshold. The output signal of the frequency discriminator circuit switches to a second logic state if the count value reaches the predetermined count value before receiving a reset signal thereby indicating that the frequency of data input signal is below the predetermined frequency threshold.

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patent: 4566111 (1986-01-01), Tanagawa
patent: 4737984 (1988-04-01), Brown
patent: 4801894 (1989-01-01), Garner
patent: 4941161 (1990-07-01), Cook

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