Title:
電力増幅器、無線通信機および電力増幅方法
Document Type and Number:
Japanese Patent JP5621780
Kind Code:
B2
Abstract:
A power amplifier comprises: polar modulator that receives modulated signal including amplitude-modulated component and phase-modulated component, outputs the amplitude-modulated component, superimposes the modulated signal on carrier wave to generate signal output as RF-modulated signal, and delays at least one of the amplitude-modulated component and the RF-modulated signal; first amplitude modulator that receives the amplitude-modulated component, pulse-modulates the amplitude-modulated component to generate signal output as pulse-modulated signal, and amplifies the amplitude-modulated component with the amplitude-modulated component and the pulse-modulated signal as control signals; second amplitude modulator that receives the amplitude-modulated component and the pulse-modulated signal, and amplifies the amplitude-modulated component with the amplitude-modulated component and the pulse-modulated signal as control signals; and first RF amplifier that receives the RF-modulated signal, amplifies the RF-modulated signal, and amplitude-modulates the amplified RF-modulated signal with output signal of second amplitude modulator.
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Inventors:
山之内 慎吾
Application Number:
JP2011534293A
Publication Date:
November 12, 2014
Filing Date:
September 30, 2010
Export Citation:
Assignee:
日本電気株式会社
International Classes:
H03F1/06; H03F1/42; H03F3/24; H03F3/68; H04B1/04
Domestic Patent References:
| JP2002252524A | 2002-09-06 | |||
| JP2003533116A | 2003-11-05 | |||
| JP2002252524A | 2002-09-06 | |||
| JP2003533116A | 2003-11-05 |
Foreign References:
| US5905407A | 1999-05-18 | |||
| WO2008090712A1 | 2008-07-31 | |||
| WO2009101905A1 | 2009-08-20 | |||
| US5905407A | 1999-05-18 | |||
| WO2008090712A1 | 2008-07-31 | |||
| WO2009101905A1 | 2009-08-20 |
Attorney, Agent or Firm:
Asamichi Kato