Title:
POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2010/125714
Kind Code:
A1
Abstract:
An efficient power amplifier with a design which, even in cases when the phase characteristics of high frequency devices used in a main amp and peaking amp differ, reduces the combination loss of the two amps at a wide range of output levels. A class AB power amplifier (103) using an LDMOS device amplifies divided input signals, and a class AB power amplifier (104) using a GaN device amplifies the signals output from the power amplifier (103). Further, a class C power amplifier (107) using a GaN device amplifies λ/4 delayed input signals, and a class C power amplifier (108) using an LDMOS device amplifies the signals output from the power amplifier (107). A combining circuit (109) combines the signals which were amplified by the power amplifier (108) with the signals which were amplified by the power amplifier (104) and subjected to impedance conversion by an impedance converter circuit (105).
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Inventors:
UCHIYAMA KAZUHIRO
Application Number:
PCT/JP2010/000585
Publication Date:
November 04, 2010
Filing Date:
February 01, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
UCHIYAMA KAZUHIRO
UCHIYAMA KAZUHIRO
International Classes:
H03F1/07; H03F3/24; H03F3/68; H04B1/04
Foreign References:
| JP2004222151A | 2004-08-05 | |||
| JP2002124840A | 2002-04-26 | |||
| JP2008211089A | 2008-09-11 | |||
| JP2008193720A | 2008-08-21 | |||
| JP2000513535A | 2000-10-10 | |||
| JP2006332829A | 2006-12-07 | |||
| JP2009109485A | 2009-05-21 |
Other References:
"A New High Efficiency Power Amplifier for Modulated Waves", PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, vol. 24, no. 9, September 1936 (1936-09-01), pages 1163 - 1182
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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