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:
Mar. 17, 2009
Filed:
Feb. 18, 2005
Madhavi Tagare, San Jose, CA (US);
Madhavi Tagare, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A switching regulator circuit is provided. The switching regulator circuit includes an oscillator circuit which includes a capacitor, a switch, a comparator, a variable resistor, and a modulating signal generation circuit. The capacitor is arranged to receive a first current to provide a ramp voltage. Also, the variable resistor is arranged to receive a second current to provide a reference voltage. The resistance of the variable resistor is modulated based on a modulating signal. The comparator is arranged to compare the ramp voltage with a reference voltage to provide a clock signal. Further, the switch is arranged to discharge the capacitor when the clock signal is asserted. The modulating signal generation circuit is arranged to provide the modulating waveform as a sawtooth signal, or other type of modulating waveform suitable for spread-spectrum modulation. Accordingly, the clock signal is a spread-spectrum clock signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile