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:
Jul. 03, 2012
Filed:
Jul. 19, 2010
Jungwoo Song, Irvine, CA (US);
Xicheng Jiang, Irvine, CA (US);
Minsheng Wang, Irvine, CA (US);
Todd L. Brooks, Laguna Beach, CA (US);
Jungwoo Song, Irvine, CA (US);
Xicheng Jiang, Irvine, CA (US);
Minsheng Wang, Irvine, CA (US);
Todd L. Brooks, Laguna Beach, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Disclosed is a closed-loop class-D amplifier circuit including a modulated reference signal generator that provides a modulated reference signal in a feed-forward path, where the reference signal is modulated corresponding to an input signal. The closed-loop class-D amplifier circuit further includes a comparator to generate a control signal based on a comparison of the modulated reference signal and a correction signal, which in turn is produced by filtering a combination of the input signal and a feedback signal. The closed-loop class-D amplifier circuit also includes a pulse generator to generate a pulse-width-modulated signal to drive an output stage of the closed-loop class-D amplifier based on the control signal.