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. 26, 2002
Filed:
Jun. 13, 2001
Jeffery B. Van Auken, Littleton, MA (US);
Sipex Corporation, Billerica, MA (US);
Abstract
A circuit and method for providing a regulated output voltage. In one embodiment, the circuit includes a feedback comparator, a latch module, a switch, a current limit module and a pulse module. The pulse module generates an off-time signal that is substantially proportional to the reciprocal of the difference of the output voltage and a supply voltage. In another aspect, the method includes the step of comparing the output voltage and a reference voltage, and comparing an inductor current and a reference current. Additionally, the method includes the step of charging the inductor in response to the comparisons, and discharging the inductor for a minimum period of time if the inductor current increase to substantially equal the reference current.