Accurately generating precisely skewed clock signals

Details Accurately generating precisely skewed clock signals Accurately generating precisely skewed clock signals

1995-11-17

1997-06-10

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

327262, 327269, 327271, 327272, 331 1A, 331 25, H03K 104

Patent

active

056380194

ABSTRACT:
Systems and methods for accurately skewing periodic signals using a matching pair of voltage controlled delay lines, a frequency comparator, and a common control signal to the delay lines as generated by the frequency comparator. A feedback oscillation is established in a loop including one of the voltage controlled delay lines. The frequency comparator controls the frequency of the loop oscillation in direct proportion to a comparison between the oscillation frequency and a subharmonic of a base clock signal. The base clock signal is sent through the second voltage controlled delay line, which by matching of delay line characteristics and a common control signal introduces a clock period of skew or delay over the length of the second voltage controlled delay line. Taps to nodes in the succession of device stages making up the second voltage controlled delay line provides the clock signals with directly proportioned skews, the skews being defined by precise physical divisions of the delay line. The magnitude of the skew is thereby accurately controlled and precisely selected.

REFERENCES:
patent: 4147891 (1979-04-01), Roos
patent: 4680779 (1987-07-01), Wakerly
patent: 4755704 (1988-07-01), Flora et al.
patent: 4868514 (1989-09-01), Azevedo et al.
patent: 5043596 (1991-08-01), Masuda et al.
patent: 5087829 (1992-02-01), Ishibashi et al.
patent: 5144170 (1992-09-01), Parker
patent: 5148113 (1992-09-01), Wight et al.
patent: 5216302 (1993-06-01), Tanizawa
patent: 5237224 (1993-08-01), DeLisle et al.
patent: 5298866 (1994-03-01), Kaplinsky
patent: 5355037 (1994-10-01), Andresen et al.
patent: 5432480 (1995-07-01), Popescu

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