| 发明名称 |
POWER AMPLIFIER MODULE |
| 摘要 |
A power amplifier module includes a first amplification transistor that amplifies and outputs a radio frequency signal, a second amplification transistor that is connected in parallel to the first amplification transistor and that has a smaller size than the first amplification transistor, a bias circuit that supplies a bias voltage or a bias current to the first and second amplification transistors, a current detector circuit that detects a current flowing in the second amplification transistor, and a bias control circuit that controls the bias voltage or the bias current supplied from the bias circuit to the first and second amplification transistors depending on the detection result of the current detector circuit. |
| 申请公布号 |
US2015070092(A1) |
申请公布日期 |
2015.03.12 |
| 申请号 |
US201414540141 |
申请日期 |
2014.11.13 |
| 申请人 |
Murata Manufacturing Co., Ltd. |
发明人 |
Ishimoto Kazuhiko;Soga Takashi |
| 分类号 |
H03F1/52;H03F3/21;H03F3/193 |
主分类号 |
H03F1/52 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A power amplifier module comprising:
a first amplification transistor configured to amplify and output a radio frequency signal; a second amplification transistor connected in parallel to the first amplification transistor and having a smaller size than the first amplification transistor; a bias circuit configured to supply a bias voltage or a bias current to the first and second amplification transistors; a current detector circuit configured to detect a current flowing in the second amplification transistor; and a bias control circuit configured to control the bias voltage or the bias current supplied from the bias circuit to the first and second amplification transistors depending on the detection result of the current detector circuit. |
| 地址 |
Kyoto JP |
