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. 13, 2005
Filed:
Dec. 19, 2002
Giuseppe Grillo, Eindhoven, NL;
Pepijn Willebrord Justinus Van DE Ven, Castletroy, NL;
Giuseppe Grillo, Eindhoven, NL;
Pepijn Willebrord Justinus Van De Ven, Castletroy, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention relates to a power amplifier being preferably applied in mobile communication devices andusing an envelope tracking technique. It is the object of the invention to improve a power amplifier with respect to its efficiency by simultaneously enabling an adaptation of the supply voltage for the unitto fast variations of an envelope signal. This object is achieved by providing a second DC/DC converterfor generating a variety of n+1 voltage levels and n threshold values both in response to a received power control signal representing a required output power of the RF output signal and by a first DC/DC converterto select one of said n+1 voltage levels as the supply voltage for said unitin response to the result of a comparison between the envelope signaland said n threshold values.