CMOS waveform digitizer

Details CMOS waveform digitizer CMOS waveform digitizer

1990-03-15

1990-12-04

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341122, H03M 112

Patent

active

049757024

ABSTRACT:
An integrated circuit for digitizing a dynamic waveform with a resolution that is much higher than that which is achievable under prior art methods is disclosed. A reference clock signal T.sub.r is provided as input to at least two L-type registers over a synchronous delay line (SDL). The reference clock signal is also coupled to the L ports of the L-type registers over a sample enable circuit. The incoming waveform is input in parallel to both L-type registers. The SDL generates timing pulses at intervals that are separated by T.sub.r /N, where N is the number of taps in the SDL. N corresponds to the equally spaced intervals at which the incoming waveform is sampled. The L-type register samples the incoming waveform according to control signals provided by the sample enable circuit. The control signals are required to guarantee the set-up and hold times for the flip-flops in the L-type register. Thus, the resolution of the digitized waveform is T.sub.r /N. This resolution is N times better than that achievable with the prior art method. The dual arrangement of the L-type register also forecloses the occurrence of any metastable states in the flip-flops of the L-type register, thus guaranteeing a continuous sampling of the incoming waveform. The outputs from the dual L-type registers are input to a muliplexer and further to a D-type register before it is outputted as a digitized waveform. The muliplexer selects the appropriate stream of sampled waveform alternatively from one of the L-type registers. Therefore, the present inventions also provide precise information about the transitions of the dynamic waveform by digitizing of the incoming waveform continuously.

REFERENCES:
patent: 4112426 (1978-09-01), Hofer et al.
patent: 4272759 (1981-06-01), Handy
patent: 4633222 (1986-12-01), Dingwall
patent: 4768017 (1988-08-01), Gordon
patent: 4833445 (1989-05-01), Buchele

Affiliated with

Also associated with

Rating

CMOS waveform digitizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-885549