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:
Nov. 21, 2017
Filed:
Oct. 17, 2016
Silergy Semiconductor Technology (Hangzhou) Ltd, Hangzhou, ZheJiang Province, CN;
Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou, CN;
Abstract
A voltage sampling control circuit can include: a bleeder circuit that generates a sampling signal by sampling a voltage across a winding of a transformer of an isolated switching power supply; a blanking time signal control circuit that activates a first blanking time signal when the sampling signal is higher than a first reference voltage, and activates a second blanking time signal when the sampling signal rises to a level of a second reference voltage, where active portions of the first and second blanking time signals overlap, and the sampling signal is not detected during activation of either of the first and second blanking time signals; a converter configured to convert the sampling signal to a detection signal after both of the first and second blanking time signals have been deactivated; and a sample and hold circuit configured to receive the detection signal, and to generate a feedback signal.