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. 30, 2012
Filed:
Jun. 17, 2010
Lon-kou Chang, Hsinchu, TW;
Tsung-hsien LU, Hsinchu, TW;
Ruei-ming Gan, Hsinchu, TW;
Macroblock, Inc., Hsinchu, TW;
Abstract
An isolated primary circuit regulator is applied to a primary side of a transformer of a power supply. The isolated primary circuit regulator outputs a switching signal, and switches the transformer by using the switching signal, thereby stabilizing an output current. The isolated primary circuit regulator includes a discharge time detector, an oscillator, a pulse width modulator and a control circuit. The discharge time detector is used for detecting a discharge time of a switching current generated at a secondary side of the transformer. The oscillator is used for generating an oscillation signal. The control circuit is used for outputting an adjustment signal. The pulse width modulator outputs a switching signal according to the oscillation signal output by the oscillator and the adjustment signal output by the control circuit. The switching signal has a duty cycle and a frequency corresponding to the oscillation signal and the adjustment signal.