Method and apparatus for measuring received Doppler cycles for a

Details Method and apparatus for measuring received Doppler cycles for a Method and apparatus for measuring received Doppler cycles for a

1981-01-26

1982-05-18

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 79D, 328140, G01R 2302

Patent

active

043307469

ABSTRACT:
The Doppler is converted to digital or a square wave signal after which a first counter is used to count total full Doppler cycles by counting the positive going zero crossings, a second counter counts relatively high frequency pulses from the beginning of each cycle until the end or until the reception of a read-out pulse, whichever occurs sooner, and a third counter counts the high frequency clock pulses from the beginning of each cycle until the end. When the read-out pulse is received the partial Doppler cycle count in the second counter is divided by the full Doppler cycle count in the third counter to obtain a fraction indicative of the partial Doppler cycle, which fraction is added to the total full Doppler count in the first counter to obtain a measure of Doppler cycles from the start until the read-out pulse is received.

REFERENCES:
patent: 4112358 (1978-09-01), Ashida

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