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. 31, 2017
Filed:
Feb. 28, 2013
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A switched mode power supply (), comprising a transformer () having a primary winding (-), a transformer core (-) configured to store energy transferred thereto from the primary winding (-) during operation, and a secondary winding (-) having a first terminal (T) and a second terminal (T). The switched mode power supply also has a primary side circuit (Q, Q, C) arranged to generate voltage pulses and thereby to drive the primary winding (-) of the transformer (), and a secondary side circuit comprising a rectification circuit connected to the secondary winding (-) at the first and second terminals (T, T). The rectification circuit is arranged such that during a forward phase of operation of the switched mode power supply, in which the primary winding (-) is driven by the primary side circuit to magnetize, and store energy in, the transformer core (-), a current induced to flow in the secondary winding (-) from the second terminal (T) to the first terminal (T) is output by the rectification circuit. The rectification circuit is further arranged such that during a fly-back phase of operation of the switched mode power supply, in which the magnetization of the transformer core (-) is reset, a current induced to flow in the secondary winding from the first terminal (T) to the second terminal (T) of the secondary winding (-) is output by the rectification circuit so that energy stored in the transformer () during the forward phase of operation is output by the rectification circuit.