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. 27, 2004
Filed:
Feb. 20, 2002
Kristopher K. Neild, Aurora, IL (US);
David A. Williams, Glen Ellyn, IL (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A power supply feedback circuit includes a regulating element at an input side of an optical isolator. The control lead for the regulating element is connected to a voltage divider to receive the divided voltage. A bypass circuit is provided on the voltage divider to change the resistance in a bypassed branch of the voltage divider during start up of the circuit. The bypass time depends on charging of a capacitor at a control lead, base or gate, of an active element by the bypass circuit. The output voltage of the circuit is brought gradually to the desired level as the capacitor charges and the active element removes the bypass from the voltage divider or applies the bypass to the voltage divider.