Title:
TRANSMISSION CIRCUIT AND TRANSMISSION METHOD
Document Type and Number:
WIPO Patent Application WO/2011/148584
Kind Code:
A1
Abstract:
Disclosed is a transmission circuit which changes the operation mode between a linear operation mode and non-linear operation mode, wherein decline in the quality of a transmission signal can be suppressed by compensating for irregularities, which are caused by temperature variations or individual irregularities, in output power generated during operation mode switching, without increasing the size of the circuit. In this transmission circuit, a gain setting section (160) sets the gain (target gain) of a variable-gain amplifier (140) to a value which causes the variable-gain amplifier (140) to operate linearly and which corresponds to the result (output error level) of comparing: the variable-gain amplifier (140) target level corresponding to the set power level of the transmission signal; and the variable-gain amplifier (140) output-signal power level detected by a power detection section (150). The variable-gain amplifier (140) then amplifies an amplitude/phase modulation signal or a phase modulation signal (phase path signal) in accordance with the target gain that is set by the gain setting section (160).
More Like This:
Inventors:
NAKAMURA MAKI
ISHIDA KAORU
ISHIDA KAORU
Application Number:
PCT/JP2011/002687
Publication Date:
December 01, 2011
Filing Date:
May 13, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
NAKAMURA MAKI
ISHIDA KAORU
NAKAMURA MAKI
ISHIDA KAORU
International Classes:
H03F1/02; H03F1/06; H03F1/30; H03F3/19; H03F3/24; H04B1/04
Domestic Patent References:
| WO2008044276A1 | 2008-04-17 | |||
| WO2008044284A1 | 2008-04-17 |
Foreign References:
| JP2004289812A | 2004-10-14 | |||
| JP2009273110A | 2009-11-19 | |||
| JP2005064662A | 2005-03-10 | |||
| JP2009218996A | 2009-09-24 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
Download PDF:
Claims: