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Title: Drive circuit for ultrasonic level gauge

Abstract: An AC drive circuit for exciting the transducer of an ultrasonic level gauge. The circuit includes a gate-controlled astable multivibrator that generates pulses of constant amplitude and constant frequency. These pulses are applied to a counter arrangement adapted to equalize the total amount of positive and negative half waves in the AC drive power derived from the output of the astable multivibrator.


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Inventors: Minami, Hiroshi (Kawasaki, JA)

Application Number: 668845
Filing Date: 1976-03-22
Publication_date: 1977-07-05
Assignee: Hokushin Electric Works, Ltd. (Tokyo, JA)
Primary Class(es): 327/108 326/105, 327/190
Other Classes:
US Patent Ref:
3002142Sep, 1961Jensen328/156.
3050708Aug, 1962VAN Alstyne et al.328/129.
3476957Nov, 1969Duckworth328/156.
3660766May, 1972Hilliard307/268.
3838414Sep, 1974Wiles328/14.
3982193Sep, 1976Maringer328/129.

Other Refs:
Primary Examiner: Heyman, John S.
Assistant Examiner:
Attorney: