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. 04, 2008
Filed:
Jul. 28, 2006
Khim Leng Low, Singapore, SG;
David Seng Poh Ho, Singapore, SG;
Chi-ming Hsiao, Hsin-Chi, TW;
Hua Beng Chan, Singapore, SG;
Khim Leng Low, Singapore, SG;
David Seng Poh Ho, Singapore, SG;
Chi-Ming Hsiao, Hsin-Chi, TW;
Hua Beng Chan, Singapore, SG;
Broadcom Corporation, Irvine, CA (US);
Abstract
A switching regulator automatically operates in pulse width modulation ('PWM') mode for high load currents and in burst mode for low load currents. The switching regulator includes a pair of switches to provide a regulated current to a load. The switching regulator further includes a multi-input comparator. A first input of the comparator is coupled to an output of the pair of switches. A second input of the comparator is coupled to a filtered version of the output and a third input is coupled to a reference waveform. The first, second and third inputs of the comparator form a combined input signal to the comparator. An output signal of the comparator is generated by comparing the combined input signal to a threshold of the comparator. The output signal determines a switching frequency of the pair of switches such that the switching frequency is automatically reduced when the load is decreased.