Robert L Wojciechowski

US Patent:

6392327, May 21, 2002

Filed:

Mar 29, 2000

Appl. No.:

09/537349

Inventors:

Douglas L. Lewis - St. Paul Park MN
Scott Ecelberger - Laurel MD
Eilaz Babaev - Minnetonka MN
Robert J. Wojciechowski - Cottage Grove MN
Ashok Kumar - Cupertino CA
Jian Ruan - Maplewood MN
Manish Kochar - Lino Lakes MN

Assignee:

James L. Sackrison - Minnetonka MN

International Classification:

H01L 4108

US Classification:

31031601, 31032301, 310354

Abstract:

A sonic transducer includes a transducer body and a drive element coupled to the transducer body to produce a sonic output in response to an applied electrical input. A sense element is coupled to the sonic drive element and is configured to provide an electrical feedback output related to the sonic output. The electrical feedback output is adapted to be used to control the applied electrical input to the sonic drive element so as to control the energy delivered to the working area or tip of the transducer.