Title:
トランスミッタのインピーダンスを動的に調節し、線形及びスイッチモード電力増幅器を選択的に直列接続するハイブリッド電力増幅器をその中で実施する装置及び方法
Document Type and Number:
Japanese Patent JP2007531470
Kind Code:
A
Abstract:
A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.
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Inventors:
Tan beer haku
Alpas randemir
Leonid Kazake Bitch
Gerald Cran
Alpas randemir
Leonid Kazake Bitch
Gerald Cran
Application Number:
JP2007506223A
Publication Date:
November 01, 2007
Filing Date:
March 18, 2005
Export Citation:
Assignee:
Interdigital Technology Corporation
International Classes:
H04B1/04; H03C1/62; H03G3/30; H04B1/46; H04B7/005; H04B17/00
Domestic Patent References:
| JPH11308125A | 1999-11-05 | |||
| JPH10242781A | 1998-09-11 | |||
| JPH1051323A | 1998-02-20 | |||
| JPH0645993A | 1994-02-18 | |||
| JP2002076949A | 2002-03-15 | |||
| JP2000124818A | 2000-04-28 | |||
| JP2001016044A | 2001-01-19 | |||
| JPH10341117A | 1998-12-22 | |||
| JPH10150339A | 1998-06-02 | |||
| JP2002009641A | 2002-01-11 | |||
| JPH10112625A | 1998-04-28 | |||
| JP2002118488A | 2002-04-19 | |||
| JPH05199070A | 1993-08-06 |
Foreign References:
| WO1999043083A1 | 1999-08-26 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe