The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
May. 22, 2000
Applicant:
Inventors:
Christopher F. Gallmeyer, Peoria, IL (US);
Larry G. Waterfield, Peoria, IL (US);
Assignee:
Caterpillar, Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/109 ;
U.S. Cl.
CPC ...
H01L 4/109 ;
Abstract
A system for controlling the operation of a piezoelectric device including a control system operable to generate a first control signal representing a desired charge on the piezoelectric device and corresponding to a desired position of a piezoelectric device. The control system further includes a charge control circuit responsive to the first control signal for providing a charge control signal to a device control circuit. The device control circuit provides a command signal that causes the piezoelectric device to move to the desired position.