Title: Method and apparatus for improving power amplifier efficiency in wireless communication systems
Application Number: 200510009553 Application Date: 2005.02.21
Publication Number: 1658497 Publication Date: 2005.08.24
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03G3/20,H03G3/30,H03F1/02,H04B1/40
Applicant(s) Name: Res In Motion Ltd. Address:
Inventor(s) Name: Chan Wen-yen M., Jiao Qingzhong, Khan Nasserullah,
Attorney & Agent: li hui
Abstract:
     A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.
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