Redundant clock module

Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural oscillators controlled

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C331S046000, C331S049000, C713S500000

Reexamination Certificate

active

06970045

ABSTRACT:
A redundant clock module provides a highly reliable fixed clock reference output. This clock reference output is based on at least two internal reference oscillators that are monitored and eliminated from use if they are not operating or within tolerance requirements. The redundant clock module comprises at least two oscillators, detection circuitry, switching circuitry and control circuitry. If a primary oscillator fails or is out of tolerance, the redundant clock module will detect the failure or out of tolerance condition and switch to a secondary working and in tolerance oscillator to take over primary timing functions of an end user application. The redundant clock module provides a slow and seamless transition between oscillator switching to assure no significant phase shift or runt pulses will affect the end user application.

REFERENCES:
patent: 4038608 (1977-07-01), Bard
patent: 4240047 (1980-12-01), Rabinowitz et al.
patent: 4254492 (1981-03-01), McDermott, III
patent: 4282493 (1981-08-01), Moreau
patent: 4369515 (1983-01-01), Valdes
patent: 4412342 (1983-10-01), Khan et al.
patent: 4521745 (1985-06-01), Falconer
patent: 4574377 (1986-03-01), Miyazaki et al.
patent: 4653054 (1987-03-01), Liu et al.
patent: 4683570 (1987-07-01), Bedard et al.
patent: 4691126 (1987-09-01), Splett et al.
patent: 4723227 (1988-02-01), Murotani
patent: 4745376 (1988-05-01), Aleksa et al.
patent: 4779008 (1988-10-01), Kessels
patent: 4839855 (1989-06-01), Van Driel
patent: 4868514 (1989-09-01), Azevedo et al.
patent: 4922128 (1990-05-01), Dhong et al.
patent: 4979191 (1990-12-01), Bond et al.
patent: 5036216 (1991-07-01), Hohmann et al.
patent: 5052030 (1991-09-01), Ernst et al.
patent: 5095280 (1992-03-01), Wunner et al.
patent: 5124569 (1992-06-01), Phillips
patent: 5146585 (1992-09-01), Smith, III
patent: 5260979 (1993-11-01), Parker et al.
patent: 5355090 (1994-10-01), Pajowski et al.
patent: 5416443 (1995-05-01), Cranford, Jr. et al.
patent: 5570397 (1996-10-01), Kubista
patent: 5631931 (1997-05-01), Takano et al.
patent: 5664165 (1997-09-01), Curry et al.
patent: 5726607 (1998-03-01), Brede et al.
patent: 5745742 (1998-04-01), Selway et al.
patent: 5812822 (1998-09-01), Selway et al.
patent: 5859996 (1999-01-01), Dryer et al.
patent: 5883533 (1999-03-01), Matsuda et al.
patent: 5886557 (1999-03-01), Wilcox
patent: 5911064 (1999-06-01), Samsom et al.
patent: 5991844 (1999-11-01), Khosrowpour
patent: 6011808 (2000-01-01), Larsson et al.
patent: 6055362 (2000-04-01), Kesner et al.
patent: 6107855 (2000-08-01), Wilcox
patent: 6188286 (2001-02-01), Hogl et al.
patent: 6194969 (2001-02-01), Doblar
patent: 6204732 (2001-03-01), Rapoport et al.
patent: 6349391 (2002-02-01), Petivan et al.
patent: 6359945 (2002-03-01), Doblar
patent: 6516422 (2003-02-01), Doblar et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Redundant clock module does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-3459699

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.