Variable delay circuit

Details Variable delay circuit Variable delay circuit

1996-09-26

1998-07-14

Cunningham, Terry

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327284, 327261, 327233, H03K 513

Patent

active

057810567

ABSTRACT:
An object of the invention is to provide a variable delay circuit having a desired optional resolution.
A variable delay section 24 is provided with paths A and B which carry signals input to an input terminal 21 to an output terminal 22, and a selection section for switching the paths A and B in accordance with a select signal. Ring oscillators 25 and 29 have oscillation periods which are x times and y times the delay time of the respective paths A and B. Phase comparison circuits 27 and 31 respectively compare, the phase of a first clock signal and the output from the ring oscillator 25, and the phase of a second clock signal and the output from the ring oscillator 29. Delay time control circuits 28 and 32 then respectively control the oscillation periods of the ring oscillators 25 and 29 so as to be equal to the respective periods of the first clock signal and the second clock signal, based on the phase comparison results, and control the delay times of the paths A and B.

REFERENCES:
patent: 4494021 (1985-01-01), Bell et al.
patent: 4703251 (1987-10-01), Baumgartner et al.
patent: 5039893 (1991-08-01), Tomisawa
patent: 5146121 (1992-09-01), Searles et al.
patent: 5216302 (1993-06-01), Tanizawa
patent: 5295174 (1994-03-01), Shimizu
patent: 5412697 (1995-05-01), Van Brunt et al.
patent: 5428309 (1995-06-01), Yamauchi et al.
patent: 5550514 (1996-08-01), Liedberg
patent: 5614855 (1997-03-01), Lee et al.

Affiliated with

Also associated with

Rating

Variable delay circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable delay circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable delay circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1885947