Reference frequency and low voltage detector circuit

Details Reference frequency and low voltage detector circuit Reference frequency and low voltage detector circuit

1983-09-12

1986-02-04

Tokar, Michael J

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

323266, 323299, 324 77A, G01R 1900

Patent

active

045688770

ABSTRACT:
A reference frequency and low voltage detector circuit for use with a constant frequency A.C. voltage source is disclosed in which a first supply circuit supplies a first voltage wave form having a repetition rate and magnitude proportional to the A.C. source voltage. A second supply circuit supplies a regulated D.C. voltage of a fixed magnitude as long as the amplitude of the A.C. source voltage is normal. The voltages produced by the first and second supply circuits are supplied to noninverting and inverting input terminals of a differential amplifier which produces a rectangular wave output signal only when the A.C. source voltage is normal. The differential amplifier output signal provides a frequency reference under normal conditions and signals a user device to switch to a secondary mode of operation when the repetition rate of the rectangular wave form changes.

REFERENCES:
patent: 4237405 (1980-12-01), Kellis
patent: 4428020 (1984-01-01), Blanchard

Affiliated with

Also associated with

Rating

Reference frequency and low voltage detector circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reference frequency and low voltage detector circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reference frequency and low voltage detector circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2343075