发明名称 |
Power amplifier, wireless communication device, and power amplification method |
摘要 |
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. |
申请公布号 |
US8797113(B2) |
申请公布日期 |
2014.08.05 |
申请号 |
US201013499205 |
申请日期 |
2010.09.30 |
申请人 |
NEC Corporation |
发明人 |
Yamanouchi Shingo |
分类号 |
H03C5/00;H03G3/00;H03F3/217 |
主分类号 |
H03C5/00 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A power amplifier comprising:
a polar modulator that receives a modulated signal including an amplitude-modulated component and a phase-modulated component, outputs the amplitude-modulated component, superimposes the modulated signal on a carrier wave to generate a signal output as an RF-modulated signal, and delays at least one of the amplitude-modulated component and the RF-modulated signal; a first amplitude modulator that receives the amplitude-modulated component, pulse-modulates the amplitude-modulated component to generate a signal output as a pulse-modulated signal, and amplifies the amplitude-modulated component with the amplitude-modulated component and the pulse-modulated signal as control signals; a 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 a first RF amplifier that receives the RF-modulated signal, amplifies the RF-modulated signal, and amplitude-modulates the amplified RF-modulated signal with an output signal of the second amplitude modulator. |
地址 |
Tokyo JP |