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:
Sep. 18, 2012
Filed:
Apr. 30, 2009
Mark Pieter Van Der Heijden, Den Bosch, NL;
Antonius Johannes Matheus DE Graaw, Haelen, NL;
Jan Sophia Vromans, Maastricht, NL;
Rik Jos, Nijimegen, NL;
Mark Pieter van der Heijden, Den Bosch, NL;
Antonius Johannes Matheus de Graaw, Haelen, NL;
Jan Sophia Vromans, Maastricht, NL;
Rik Jos, Nijimegen, NL;
NXP B.V., Eindhoven, NL;
Abstract
Method for setup of parameter values in a RF power amplifier circuit arrangement (), wherein the amplifier circuit arrangement () comprises a first () and a second () amplification branch and is operated in an out-phasing configuration for amplification of RF input signals with modulated amplitude and modulated phase and respective circuit arrangements are disclosed. According to a first aspect a re-optimization of the dead-time or conversely the duty-cycle, respectively, the phase of the output signal after the combiner can be kept linear with respect to the out-phasing angle. Further, according to a second aspect, additionally to introduction of an optimally chosen dead-time, a non-coherent combiner (Lx, Lx*) can reduce crowbar current and switching losses due the output capacitance (Cds). Furthermore, according to a third aspect the reactive compensation can, additionally or alternatively, be controlled by operating both amplification branches at different duty-cycles.