US Patent 7227294 Piezoelectric motor drive circuit and method

Patent 7227294 was granted and assigned to Symbol Technologies on June, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Symbol Technologies

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7227294

Date of Patent

June 5, 2007

Patent Application Number

11119060

Date Filed

April 29, 2005

Patent Primary Examiner

‌

Darren Schuberg

Patent abstract

A piezoelectric transducer is driven to mechanically oscillate a mirror at a mechanical resonant frequency with high precision despite frequency variations introduced by temperature, tolerances and ageing of components. Switches are actuated at different times in order to make the drive frequency correspond to the mechanical resonant frequency.