发明名称 |
High-frequency power amplification electronic part and wireless communication system |
摘要 |
A high-frequency power amplification electronic part is disclosed which comprises a power amplifier circuit and a bias control circuit, the power amplifier circuit having a plurality of amplifier stages for amplifying an input high-frequency signal, the bias control circuit acting to bias the power amplifier circuit. The power amplifier circuit controls output power in accordance with input power that is varied while a gain of the power amplifier circuit is being fixed by either a bias current or a bias voltage supplied from the bias control circuit. The bias control circuit supplies at least two diode characteristic elements with a predetermined current each in order to generate at least two voltages demonstrating different temperature characteristics, the bias control circuit further using the generated voltages as a basis for generating either a plurality of bias currents or a plurality of bias voltages having a desired temperature-dependent rate of change each, the generated bias currents or bias voltages being fed to each of the plural amplifier stages constituting the power amplifier circuit.
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申请公布号 |
US6958649(B2) |
申请公布日期 |
2005.10.25 |
申请号 |
US20050097271 |
申请日期 |
2005.04.04 |
申请人 |
HITACHI HYBRID NETWORK, CO., LTD. |
发明人 |
NAGAMORI HIROYUKI;TSUTSUI TAKAYUKI;MATSUSHITA KOUICHI |
分类号 |
H03F3/68;H03F1/30;H03G3/30;H04B1/04;(IPC1-7):H03G5/16 |
主分类号 |
H03F3/68 |
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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