Method and apparatus for digital frequency synthesis

Details Method and apparatus for digital frequency synthesis Method and apparatus for digital frequency synthesis

2005-05-10

2005-05-10

Nguyen, Simon (Department: 2685)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C455S076000, C455S165100, C455S183100, C455S209000, C455S550100, C375S327000, C375S373000, C375S376000

Reexamination Certificate

active

06891420

ABSTRACT:
A digital frequency synthesizer includes one or more reference clocks (104, 1316, 1502A,1504A,1506A) optionally coupled through one or more pulse width reducers (106) to one or more main delay lines (108, 702, 1502B,1504B,1506B) that include a plurality of output taps (108B-108I,702B-702E). During at least certain periods of the reference clock (104) a plurality of the output taps are coupled to a common output (130, 1312, 1508), thereby producing an output signal that has a frequency that exceeds a frequency of the one or more reference clocks. The coupling is preferably accomplished by transmission gates (114, 128, 720-724, 1420-1434) that are switched by gating pulses that are received from decoders (148, 150, 1418) via gating signal delay lines (134-146, 704-718, 1404-1416).

REFERENCES:
patent: 4346477 (1982-08-01), Gordy
patent: 4742563 (1988-05-01), Fukumura
patent: 4980585 (1990-12-01), Bazes
patent: 5303400 (1994-04-01), Mogi
patent: 5471659 (1995-11-01), Wong
patent: 5535247 (1996-07-01), Gailus et al.
patent: 5748683 (1998-05-01), Smith et al.
patent: 5889436 (1999-03-01), Yeung et al.
patent: 5913155 (1999-06-01), Tomiyama
patent: 5977805 (1999-11-01), Vergnes et al.
patent: 6037812 (2000-03-01), Gaudet
patent: 6044120 (2000-03-01), Bar-David et al.
patent: 6100735 (2000-08-01), Lu
patent: 6104223 (2000-08-01), Chapman et al.
patent: 6148186 (2000-11-01), Fujita
patent: 6205193 (2001-03-01), Solve et al.
patent: 6226505 (2001-05-01), Uda
patent: 6236690 (2001-05-01), Mimura et al.
patent: 6353649 (2002-03-01), Bockleman et al.
patent: 6480047 (2002-11-01), Abdel-Maguid et al.
patent: 6484038 (2002-11-01), Gore et al.
patent: 6510191 (2003-01-01), Bockelman
patent: 6515633 (2003-02-01), Ippolito
patent: 6556630 (2003-04-01), Brinsfield et al.
patent: 20020032042 (2002-03-01), Poplawsky et al.
patent: 20030099321 (2003-05-01), Juan
patent: 20030152181 (2003-08-01), Stengel et al.
Jerry D. Gibson, “The Communications Handbook”, 1997, CRC Press, p. 11.

Affiliated with

Also associated with

Rating

Method and apparatus for digital frequency synthesis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for digital frequency synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for digital frequency synthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3428388