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:
Dec. 03, 2002
Filed:
Mar. 20, 2002
Hideto Takagishi, San Jose, CA (US);
Monolithic Power Systems, Inc., Los Gatos, CA (US);
Abstract
A Class D amplifier circuit performs audio signal processing and other signal processing by using a bang-bang controller and a noise-shaping feedback network. The bang-bang controller triggers generation of a rectangular waveform that corresponds to changes in a control signal derived from an input analog signal, with the generation of the rectangular waveform being based on a comparison of the control signal with another signal derived from hysteresis associated with an output of a comparator. A filter filters the rectangular waveform to obtain an amplified output analog signal substantially representative of the input analog signal. The feedback network noise shapes the output analog signal, and feeds back the noise-shaped output analog signal and substracts it from the input analog signal.