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Piezoelectric drive circuit

United States Patent

5,945,768
August 31, 1999
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A piezoelectric motor drive circuit is provided which utilizes the piezoelectric elements as oscillators and a Meacham half-bridge approach to develop feedback from the motor ground circuit to produce a signal to drive amplifiers to power the motor. The circuit automatically compensates for shifts in harmonic frequency of the piezoelectric elements due to pressure and temperature changes.
Treu, Jr.; Charles A. (Raymore, MO)
AlliedSignal Inc. (Morris Township, NJ)
08/ 853,500
May 8, 1997
The United States Government has rights in this invention pursuant to contract number DE-AC04-76-DP00613 with the United States Department of Energy.