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:
Jul. 14, 2015
Filed:
Dec. 23, 2010
John P. Clarkin, Coventry, RI (US);
Patrizio Vinciarelli, Boston, MA (US);
Jeffrey Bruce Van Auken, Littleton, MA (US);
John P. Clarkin, Coventry, RI (US);
Patrizio Vinciarelli, Boston, MA (US);
Jeffrey Bruce Van Auken, Littleton, MA (US);
Picor Corporation, North Smithfield, RI (US);
Abstract
A primary-side sampled feedback system includes a sample acquisition phase during which the voltage across the clamp capacitor is sensed as a measure of the primary-reflect output voltage. One end of the clamp capacitor is ground-referenced during the sample acquisition phase. The sample circuitry, which may include a transformer-coupled input for receiving the gate drive of the secondary switch, may use primary side, secondary-side, or primary and secondary side signals to generate the sample acquisition control pulse and clamp switch drive signal. The sample acquisition control pulse occurs when the secondary current reaches its minimum or zero.