US 7,321,750 B2
Communication system, device and method
Hendrik J. Bergveld, Eindhoven (Netherlands); and Franciscus A. C. M. Schoofs, Eindhoven (Netherlands)
Assigned to NXP B.V., Eindhoven (Netherlands)
Filed on Apr. 24, 2001, as Appl. No. 9/840,819.
Application 09/840819 is a continuation of application No. 09/207528, filed on Dec. 08, 1998.
Claims priority of application No. 97203902 (EP), filed on Dec. 12, 1997.
Prior Publication US 2001/0014613 A1, Aug. 16, 2001
Int. Cl. H01Q 11/12 (2006.01); H04B 1/04 (2006.01)
U.S. Cl. 455—91  [455/126; 455/127.1; 455/572; 330/297] 18 Claims
OG exemplary drawing
 
1. A communication system, comprising:
a base station; and
a communication device for communicating with said base station, said communication device including:
an amplifier which outputs an RF signal having a frequency;
a DC/DC converter connected to a power supply and adapted to provide a voltage to the amplifier to vary a power of the signal, the DC/DC converter is exclusively controlled in dependence of said frequency to vary the voltage provided by the amplifier; and
a controllable switch connected to the power supply and the amplifier to directly connect the power supply to the amplifier.