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:
Oct. 07, 1997
Filed:
Mar. 28, 1996
Applicant:
Inventor:
Yasuhei Shimada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 71 ; 363 97 ; 363131 ;
Abstract
N-channel enhancement type switching transistors complementarily turn on and off in response to pulse signals complementary to each other so as to cause two auto-transformers to alternately supply secondary potentials to primary electrodes of a piezoelectric transformer, and the piezoelectric transformer supplies an alternating current signal to a load; the primary winding portion of each auto-transformer is dually used in the accumulation of current energy and the resonating phenomenon for generating the secondary potential, and, for this reason, the auto-transformers make the driving circuit for the load compact.