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:
Sep. 12, 2006
Filed:
Jul. 15, 2004
Jane Xin-leblanc, Sunnyvale, CA (US);
Jane Xin-LeBlanc, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A pulse-width modulator (PWM) accommodates a wider range of output pulse widths, with less gain variation, when compared to conventional circuits. The PWM can operate without requiring a voltage reference. In one example PWM, a ramp generator in the PWM includes a capacitive element that is charged by a current from a trans-conductance cell that is responsive to the input voltage and a power supply voltage. In another example PWM, the ramp generator cell in the PWM includes a follower circuit that is responsive to the input voltage. The PWM is suitable for use in a variety of applications including switching power converters.