Precision time of day counter

Details Precision time of day counter Precision time of day counter

G - Physics

06

M

G06M 3/00 (2006.01) G04G 3/02 (2006.01) H03K 21/16 (2006.01) H03K 23/40 (2006.01) H03K 23/50 (2006.01) H03K 23/58 (2006.01)

Patent

CA 2172095

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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