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Title:
METHOD AND APPARATUS PROVIDING INTEGRATED LOAD MATCHING USING ADAPTIVE POWER AMPLIFIER COMPENSATION
Document Type and Number:
WIPO Patent Application WO2005022740
Kind Code:
A3
Abstract:
An RF power amplifier module can be used without a matching device between the power amplifier module and an antenna. The power amplifier module is constructed and operated to detect, protect and maintain the performance of the power amplifier in the presence of severe VSWR load mismatches, without requiring the use of external circuitry. The RF power amplifier module includes integral detection circuitry for generating a first detection signal having a value that is indicative of the current flowing through an output power transistor and a second detection signal having a value that is indicative the voltage appearing at the output of the output power transistor, as well as integral compensation circuitry for controlling the generation of a plurality of bias current and bias voltage signals to have values that are a function of the values of the first and second detection signals, as well as the current output power level of the RF power amplifier module. Also included is an integral impedance matching circuit, coupled between the output of the output transistor and the output node,. that provides a variable impedance that is selectively controlled by an output signal from the compensation circuitry.

Inventors:
KALAJO SAMI (US)
JARVINEN ESKO (US)
VINTOLA VILLE (US)
TAMBORINO FRANK ANTHONY (US)
KOPP WILLIAM SHERIDAN (US)
Application Number:
PCT/IB2004/002631
Publication Date:
April 13, 2006
Filing Date:
August 12, 2004
Export Citation:
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Assignee:
NOKIA CORP (FI)
NOKIA INC (US)
RF MICRO DEVICES INC (US)
KALAJO SAMI (US)
JARVINEN ESKO (US)
VINTOLA VILLE (US)
TAMBORINO FRANK ANTHONY (US)
KOPP WILLIAM SHERIDAN (US)
International Classes:
H01Q11/12; H03C1/62; H03F1/02; H03F1/56; H03F3/191; H03F3/24; H03H7/40; H03H11/30; H04B1/04; H04B17/00; H03F; (IPC1-7): H01Q11/12; G01R27/04; G01R27/32; H02H7/20; H03F3/04; H03G3/20; H04B1/00; H04B1/04; H04B1/06; H04B7/00
Foreign References:
US20050032488A12005-02-10
US5590408A1996-12-31
US5659253A1997-08-19
US6753734B22004-06-22
US5862458A1999-01-19
US5898912A1999-04-27
Other References:
See also references of EP 1665519A4
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