Boris F Grib

US Patent:

45771642, Mar 18, 1986

Filed:

Oct 1, 1984

Appl. No.:

6/656711

Inventors:

Boris F. Grib - Dix Hills NY

Assignee:

Philamon Incorporated - Farmingdale NY

International Classification:

H03B 530
H03L 500

US Classification:

331109

Abstract:

There is disclosed a drive regulation and control circuit for a tuning fork resonator also adaptable to other electrical devices wherein an approximately sine wave signal from a motion sensor is applied to an instantaneous level detector which causes a variable width pulse signal to be on during that portion of the sine wave signal where the instantaneous level exceeds an adjustable reference level; a control signal is generated with a magnitude varying as a moving average of the width of the variable width pulses; the control signal causes the reduction of current to the tuning fork drive to cause reduction of motion amplitude. An optional feature provides rapid response by activating a motion braking signal having a duration approximately equal to the variable width pulse "on" period. A distinctive feature of the instantaneous level detector is the fact that the sine wave signal is not rectified but is rather converted to a fluctuating direct current signal with a DC level accurately determined by an internal semi-conductor voltage reference element.