Precision time of day counter

Details Precision time of day counter Precision time of day counter

1995-05-11

1998-01-06

Wambach, Margaret Rose

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Measuring or testing

377 51, 377 54, 377 78, H03K 2140

Patent

active

057063222

ABSTRACT:
A very high speed counter system of operating at frequencies of up to around 800 MHz provides timing measurements with accuracies on the order of (1/f) seconds where f is the frequency of operation. The least significant bit of the counter operates at the given frequency of a first clock signal while the other higher order bits operate at a second clock signal where the second clock signal is one-half the frequency of the first clock signal and is inverted. Carry lookahead circuits connected between stages of the second counter operate in conjunction with the clocking scheme to produce a high speed and accurate counter.

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