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:
May. 17, 2016
Filed:
Dec. 30, 2009
Yeshoda Yedevelly, Sunnyvale, CA (US);
Pavel Konecny, San Jose, CA (US);
Wayne T. Holcombe, Mountain View, CA (US);
Yeshoda Yedevelly, Sunnyvale, CA (US);
Pavel Konecny, San Jose, CA (US);
Wayne T. Holcombe, Mountain View, CA (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control circuitry in an integrated circuit used to generate the pulse width modulated signal. The charging is stopped when either the charging current goes above a predetermined charging current level or when the capacitor voltage goes above a predetermined capacitor voltage.