Clock signal monitoring apparatus

Details Clock signal monitoring apparatus Clock signal monitoring apparatus

1997-10-20

1999-12-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By presence or absence pulse detection

327 48, 377 20, 377 16, H03K 17296

Patent

active

060086718

ABSTRACT:
An apparatus for monitoring a reference clock signal having a clock pulse train comprises a detecting block for counting pluses of a count clock signal to produce a count value and generate a count failure signal when the count value reaches a predetermined value, wherein the frequency of the count clock signal is larger than that of the reference clock signal; and a controlling block for generating a clear signal at every clock pulse of the reference clock signal to cleat the detecting block when the clear signal is inputted thereto.

REFERENCES:
patent: 4374361 (1983-02-01), Holden
patent: 4379993 (1983-04-01), Holden
patent: 4698829 (1987-10-01), Di Giulio

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