Title:
TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/133170
Kind Code:
A1
Abstract:
[Problem] To provide a transmission device (10) which amplifies and outputs a modulation signal (11) with high efficiency and high linearity.
[Solution] A transmission device (10) is provided with a power amplifier (20) as an amplifier, a power supply device (30), and a delayer (40). The power amplifier (20) comprises an input terminal (21) which receives as input a modulation signal (11) containing an amplitude modulation component (12) and a phase modulation component, and a power supply terminal (22) which receives as input a power supply voltage (Vout), said power amplifier (20) using the power supply voltage (Vout) to amplify and output a modulation signal (11). The power supply device (30) comprises a switching amplifier section (50) and a linear amplifier section (60) and feeds to the power supply terminal (22) a power supply voltage (Vout) following the waveform of the amplitude modulation component (12) of the modulation signal (11). The delayer (40) is connected between the power supply terminal (22) and the input terminal (21) and compensates for the timing deviation between the operations of the switching amplifier section (50) and the linear amplifier section (60).
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Inventors:
KUNIHIRO KAZUAKI (JP)
Application Number:
PCT/JP2013/055702
Publication Date:
September 12, 2013
Filing Date:
March 01, 2013
Export Citation:
Assignee:
NEC CORP (JP)
KUNIHIRO KAZUAKI (JP)
KUNIHIRO KAZUAKI (JP)
International Classes:
H03F3/24; H03F1/02; H03F1/32; H04B1/04
Foreign References:
| JP2004534469A | 2004-11-11 | |||
| JP2010016794A | 2010-01-21 | |||
| JP2005176331A | 2005-06-30 |
Attorney, Agent or Firm:
TAKAHASHI ISAMU (JP)
Isamu Takahashi (JP)
Isamu Takahashi (JP)
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Claims: