Frequency comparator

Details Frequency comparator Frequency comparator

1976-09-09

1978-01-10

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 83D, G01R 2314

Patent

active

040681718

ABSTRACT:
Two frequencies to be compared are applied to two inputs of a flip-flop. output of the flip-flop is fed to a low pass filter and the output of the filter is a saw tooth voltage proportional to the phase difference between the two frequencies. Differentiation of the saw tooth voltage yields a voltage proportional to the difference between the two frequencies. A threshold circuit is provided for sensing the output voltage of the filter to control a flip-flop which in turn reverses the phase of one of the frequency signals and disconnects the output of the differentiator from a capacitive storage circuit.

REFERENCES:
patent: 3671876 (1972-06-01), Oshiro
patent: 3754241 (1973-08-01), Maehara

Affiliated with

Also associated with

Rating

Frequency comparator does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2273461