GPS synchronized frequency/time source

Details GPS synchronized frequency/time source GPS synchronized frequency/time source

1993-05-27

1995-08-08

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342357, 368200, 375362, H04B 7185, G04B 1800, H04L 704

Patent

active

054403138

ABSTRACT:
A GPS-based frequency/time source of the present invention provides an accurate, traceable low cost reference. In particular, the GPS-based frequency/time source includes a GPS receiver, a variable frequency oscillator and a micro processor. The GPS receiver receives and produces as output signals GPS information, whereas the variable frequency oscillator has a frequency control input terminal and produces an output frequency signal, and is coupled to the GPS receiver. The micro processor is coupled to receive the output signals produced by the GPS receiver and produces an error signal indicative of a difference in frequency between GPS synchronized frequency and the output frequency signal of the variable frequency oscillator. Circuitry is responsive to the error signal to produce an electronic frequency control signal, which is applied to the frequency control input of the variable frequency oscillator so as to cause the difference in frequency to be reduced. In this manner, a low cost oscillator may be employed in such a way as to produce a very accurate output frequency signal.

REFERENCES:
patent: 3614630 (1971-10-01), Rorden
patent: 3763492 (1973-10-01), Easton
patent: 4457006 (1984-06-01), Maine
patent: 4578678 (1986-03-01), Hurd
patent: 4582434 (1986-04-01), Plangger et al.
patent: 4689626 (1987-08-01), Hori et al.
patent: 4899117 (1990-02-01), Vig
patent: 5043736 (1991-08-01), Darnell et al.
patent: 5070537 (1991-12-01), Ohira et al.
patent: 5098839 (1992-03-01), Kohno et al.
patent: 5108334 (1992-04-01), Eschenbach et al.
patent: 5148437 (1992-09-01), Ohtsu et al.
patent: 5153599 (1992-10-01), Harigae et al.
patent: 5184347 (1993-02-01), Farwell et al.

Affiliated with

Also associated with

Rating

GPS synchronized frequency/time source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with GPS synchronized frequency/time source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GPS synchronized frequency/time source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-974666