Fractional period delay circuit

Details Fractional period delay circuit Fractional period delay circuit

1997-11-10

2000-04-18

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327244, 327245, H03H 1126

Patent

active

060520116

ABSTRACT:
A fractional period delay circuit to delay a clocking signal by a non-integer fraction of the period of the clocking signal is disclosed. The fractional period delay circuit has a first delay line connected to a master timing signal to delay the master clock to form the first timing signal. The fractional period delay circuit has plurality of adjustable delay lines. Each adjustable delay line is connected to the master timing signal to delay the master timing A delay adjustment input will modify the delay of the adjustable delay circuit. The fractional period delay circuit further has a plurality of phase difference detectors connected to the output of the first delay line and to the output of one of the plurality of adjustable delay lines. The phase difference detector will create a difference signal indicating a difference in phase between the first timing signal and one of the delayed timing signals. A plurality of sequence timing signals are created in a is timing sequence generator. A phase correction calculators is connected to a phase difference detector and the timing sequence generator to calculate a delay adjustment signal. The delay adjustment signal is an error signal indicating the delay between the delayed timing signal and the first timing signal. The delay adjustment signal is transferred to a delay line adjustment circuit to adjust the delay of the adjustable delay line.

REFERENCES:
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patent: 5103114 (1992-04-01), Fitch
patent: 5184027 (1993-02-01), Masuda et al.
patent: 5532633 (1996-07-01), Kawai
patent: 5594376 (1997-01-01), McBride et al.
patent: 5815017 (1998-09-01), McFarland

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