Abnormal clock signal detector and switching device

Details Abnormal clock signal detector and switching device Abnormal clock signal detector and switching device

1997-07-11

1999-10-19

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

327 20, 331 49, 331 74, H03K 522, H03L 700

Patent

active

059695587

ABSTRACT:
A system clock signal switching device capable of switching outputs from a plurality of clock signal generation systems i order to ensure the continuous supply of a stable system clock signal. An oscillation circuit A generates a clock signal CK1 as an ordinary system clock signal while an oscillation circuit B generates a clock signal CK2 as another separate clock signal, such as the time-count clock signal. The output lines of these circuits are connected with the input terminals of a multiplexer. An output clock signal monitor circuit checks the clock signal CK1 from the oscillation circuit A, wherein input terminals of the monitor are connected with the output lines to attain the operational clock signals for its monitoring operation. A monitor flag from the monitor circuit is supplied to a switching signal input terminal of the multiplexer via a line. An output line of the multiplexer is provided to a subsequent circuit using the system clock signal while the output line of the oscillation circuit B is provided to the subsequent circuits such as a time-count circuit.

REFERENCES:
patent: 3708686 (1973-01-01), Butler, Jr. et al.
patent: 4254492 (1981-03-01), McDermott, III
patent: 4949052 (1990-08-01), Chigira
patent: 5063357 (1991-11-01), Williams et al.
patent: 5371764 (1994-12-01), Gillingham et al.
patent: 5416443 (1995-05-01), Cranford, Jr. et al.

Affiliated with

Also associated with

Rating

Abnormal clock signal detector and switching device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Abnormal clock signal detector and switching device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abnormal clock signal detector and switching device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2060900