Frequency and time measurement circuit

Details Frequency and time measurement circuit Frequency and time measurement circuit

1984-04-03

1986-07-29

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

368120, G01R 2302

Patent

active

046032924

ABSTRACT:
A frequency and time measurement circuit is provided with a delay means for effectively delaying the leading edge of a pulse. A register is clocked by the trailing edge of the pulse to take a snapshot of how far the leading edge of the pulse has progressed through the delay means. During a calibration phase, a reference pulse of constant length is used to take a reference reading. During a measurement phase, the measurement reading is taken on the unknown pulse whose clock frequency or time period is to be determined. By comparing the reference reading with the measurement reading, the relative clock frequency or time of the unknown pulse can be determined.

REFERENCES:
patent: 4011502 (1977-03-01), Fraser
patent: 4310891 (1982-01-01), Niki
patent: 4336541 (1982-01-01), Tsui
patent: 4426648 (1984-01-01), Tsui
patent: 4433919 (1984-02-01), Hoppe
patent: 4439046 (1984-03-01), Hoppe
patent: 4547727 (1985-10-01), Tsui

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