Oscillation control apparatus for ultrasonic oscillator

Details Oscillation control apparatus for ultrasonic oscillator Oscillation control apparatus for ultrasonic oscillator

1990-05-01

1991-03-19

Pascal, Robert J.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

310316, H03L 706

Patent

active

050014420

ABSTRACT:
In an oscillation control apparatus for an ultrasonic oscillator, an FET circuit is connected to an oscillation circuit for varying a resistant value of a resistor unit of the oscillation circuit, which determines a free-running frequency thereof. A phase-difference detecting circuit is provided for detecting a relative phase difference between voltage and current in the ultrasonic oscillator. A threshold discrimination circuit outputs a signal when the phase difference inputted from the phase-difference detecting circuit exceeds at least a predetermined value. A pump circuit integrates the signal from the threshold discrimination circuit. A resistant value of the FET circuit varies when an output signal from the pump circuit exceeds a predetermined value.

REFERENCES:
patent: 4879528 (1989-11-01), Gotanda

Affiliated with

Also associated with

Rating

Oscillation control apparatus for ultrasonic oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oscillation control apparatus for ultrasonic oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillation control apparatus for ultrasonic oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2012963