发明名称 |
High linearity doherty communication amplifier with bias control |
摘要 |
The present invention relates to bias control of a power amplification circuit of a mobile device for improving the efficiency and the linearity properties of the power amplifier. In one embodiment, the power amplifier improves these properties by receiving a voltage control signal to bias a supplemental amplifier so that the power amplifier operates in a Doherty mode in a low output power range and in a non-Doherty mode in a high output power range. In the non-Doherty mode, the supplemental amplifier is biased as a class AB amplifier via the received voltage control signal to satisfy the non-linear operational requirements of the power amplifier in the high output power range. The power amplifier generates the voltage control signal based upon power levels of signals received from a remote base station. |
申请公布号 |
GB2421862(B) |
申请公布日期 |
2007.11.07 |
申请号 |
GB20060005973 |
申请日期 |
2004.10.19 |
申请人 |
WAVICS, INC.;AGILENT TECHNOLOGIES, INC.;AVAGO TECHNOLOGIES GENERAL IP |
发明人 |
YOUNGWOO KWON;JUNGHYUN KIM |
分类号 |
H03F1/02;H03F;H03F1/32;H03F3/68;H04B7/005 |
主分类号 |
H03F1/02 |
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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