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. 15, 2011
Filed:
Mar. 25, 2004
Matthias Wendt, Würselen, DE;
Iain Mosely, Cleveland, GB;
F. Javier Esguevillas, Cambrils, ES;
Thomas Dürbaum, Baiersdorf, DE;
Georg Sauerländer, Aachen, DE;
Heinz Van Der Broeck, Zülpich, DE;
Matthias Wendt, Würselen, DE;
Iain Mosely, Cleveland, GB;
F. Javier Esguevillas, Cambrils, ES;
Thomas Dürbaum, Baiersdorf, DE;
Georg Sauerländer, Aachen, DE;
Heinz Van Der Broeck, Zülpich, DE;
NXP B.V., Eindhoven, NL;
Abstract
Recently, the use of class-D audio amplifiers has become more and more widespread. In contrast to the generally employed class-AB linear amplification technology, class-D allows for improved efficiency. However, the class-D principle is known for its poor distortion characteristics. According to the present invention a digital amplifier () is provided for converting an audio signal to a power output, comprising a ripple suppression circuit () for suppressing voltage ripples in a supply voltage supplied to the bridge circuit with () at least one pair of switches. The ripple suppression circuit () suppresses ripples in the supply voltage supplied to a switch in the bridge circuit (), which has been found to cause a major part of the distortions in the output signal of the digital amplifier ().