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:
Jan. 02, 2001
Filed:
Oct. 07, 1999
Applicant:
Inventor:
Richard Farrington, Heath, TX (US);
Assignee:
Ericsson Inc., Richardson, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 7/217 ; H02M 7/68 ; H02H 7/125 ;
U.S. Cl.
CPC ...
H02M 7/217 ; H02M 7/68 ; H02H 7/125 ;
Abstract
An externally-driven synchronous rectifier circuit (,) comprises first and second synchronous rectifiers (SQ,, SQ,), and first and second synchronous rectifier recovery switches (SQ,, SQ,), and a pair of resonant inductors (LR,LR,). The resonant inductors (LR,LR,) store the energy normally loss during charging and discharging the input capacitance of the first and second synchronous rectifiers (SQ,SQ,). The recovery switches (SQ,SQ,) transfer the stored energy from the at least one inductor (L,) to the output terminal (Vout) creating a more energy efficient circuit (,).