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:
Mar. 13, 2001
Filed:
Jun. 05, 1999
Applicant:
Inventor:
Joseph R. Burns, Trenton, NJ (US);
Assignee:
Ocean Power Technologies, Inc., Pennington, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/1113 ;
U.S. Cl.
CPC ...
H01L 4/1113 ;
Abstract
A d.c. bias arrangement for increasing the efficiency of electrical power extraction from a piezoelectric transducer comprising a piezoelectric material, particularly of the electrostrictive type, contacted by first and second electrodes. The first electrode is connected directly to an electrical load connected directly to ground potential. The second electrode is connected by two in-parallel paths to the ground potential, one of the paths comprising a d.c. voltage source in series with a large bias resistor, and the other of the paths comprising a large a.c. power bypassing capacitor.