发明名称 |
POWER AMPLIFIER AND COMMUNICATION DEVICE |
摘要 |
A power amplifier, includes: a first and a second amplifier circuits that are controlled so that one of them do not amplify a signal when another one of them amplifies the signal; a first impedance conversion circuit, coupled between the first amplifier circuit and the output terminal, that converts an output impedance of the first amplifier circuit; a second impedance conversion circuit, coupled between the second amplifier circuit and a wiring coupling the first impedance conversion circuit and the output terminal, that converts an output impedance of the second amplifier circuit; and a connection circuit that, when the first amplifier circuit amplifies the signal, forms a path which bypasses the second impedance conversion circuit between a reference potential and the wiring coupling the first impedance conversion circuit and the output terminal, by coupling a wiring coupling the first amplifier circuit and the output terminal, with the reference potential. |
申请公布号 |
US2014295781(A1) |
申请公布日期 |
2014.10.02 |
申请号 |
US201414227975 |
申请日期 |
2014.03.27 |
申请人 |
FUJITSU SEMICONDUCTOR LIMITED |
发明人 |
KAWANO Yoichi |
分类号 |
H03F3/68;H03F3/19;H03G3/30;H03F3/21 |
主分类号 |
H03F3/68 |
代理机构 |
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代理人 |
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主权项 |
1. A power amplifier, comprising:
a first amplifier circuit and a second amplifier circuit that are controlled so that one of the first and the second amplifier circuits does not amplify a signal when another one of the first and the second amplifier circuits amplifies the signal, the another one configured to amplify the signal and to output the amplified signal from a common output terminal; a first impedance conversion circuit that is coupled between the first amplifier circuit and the output terminal, and is configured to convert an output impedance of the first amplifier circuit; a second impedance conversion circuit that is coupled between the second amplifier circuit and a wiring coupling the first impedance conversion circuit and the output terminal, and is configured to convert an output impedance of the second amplifier circuit; and a connection circuit that, when the first amplifier circuit amplifies the signal, forms a path which bypasses the second impedance conversion circuit between a reference potential and the wiring coupling the first impedance conversion circuit and the output terminal, by coupling a wiring coupling the first amplifier circuit and the output terminal, with the reference potential. |
地址 |
Yokohama-shi JP |