发明名称 |
HIGH EFFICIENCY POWER AMPLIFIER |
摘要 |
Disclosed a power amplifier including a main amplifier with class bias AB and a peak amplifier with class C bias. A quarter-wave length transmission line having a length equal to one-fourth of the wave-length of a fundamental frequency is connected to an output side of the peak amplifier. Outputs of the main amplifier and the peak amplifier are combined. An envelope amplifier that modulates the drain bias voltage in accordance with an envelope of the modulation wave input signal and an envelope detector are provided as a drain-bias circuit for the main amplifier (FIG. 1).
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申请公布号 |
US2009179703(A1) |
申请公布日期 |
2009.07.16 |
申请号 |
US20090351876 |
申请日期 |
2009.01.12 |
申请人 |
NEC ELECTRONICS CORPORATION |
发明人 |
TAKENAKA ISAO |
分类号 |
H03F3/21;H03F3/16;H03F3/68 |
主分类号 |
H03F3/21 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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