Horology: time measuring systems or devices – Regulating means – For compensation
Patent
1990-03-02
1992-12-01
Roskoski, Bernard
Horology: time measuring systems or devices
Regulating means
For compensation
368118, 368286, G04B 1720
Patent
active
051684780
ABSTRACT:
A time standard assembly for a global positioning system (GPS), such as for a space vehicle, has a natural-frequency atomic frequency standard (NAFS) which is operated at its natural resonant frequency in order to output an upset-proof natural frequency signal. The assembly includes a frequency synthesizer unit (FSU) and microprocessor data unit (MDU) which are hardened by combining them together and enclosing them in one integral unit which is shielded from the electromagnetic pulse of an upset event. Multiply redundant NAFS, FSUs, and MDUs are used to improve reliability and for maintaining units on-line and in standby. A dithered clock frequency signal is generated by the FSU according to a dither algorithm performed by the MDU, and the MDU generates encoded clock data using the dithered clock frequency signal. The MDU includes an upset recovery mechanism for resetting its registers and counters using the upset-proof natural frequency signal from the NAFS upon detecting the occurrence of an upset event.
REFERENCES:
patent: 4755824 (1988-07-01), Buddulph et al.
Hogan Patrick M.
ITT Corporation
Plevy Arthur L.
Roskoski Bernard
LandOfFree
Time standard assembly with upset protection and recovery means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Time standard assembly with upset protection and recovery means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time standard assembly with upset protection and recovery means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-507419