发明名称 |
Advanced load-switch circuit with zero phase rotation |
摘要 |
The present disclosure relates to the efficient transmission of voice and data signals using mobile terminals, and in particular to optimizing the power added efficiency (PAE) of a power amplifier (PA) by controlling the amplifier's load impedance over a range of radio frequency (RF) output power levels. A power amplifier having a first power level and at least a second power level is provided along with a first impedance matching network section with an output. A second impedance matching network section and at least a third impedance network section in communication with the output are selectably coupled to a load network by switches that are opened and close in response to various power levels of operation for the load switch circuit.
|
申请公布号 |
US8437714(B1) |
申请公布日期 |
2013.05.07 |
申请号 |
US20100835793 |
申请日期 |
2010.07.14 |
申请人 |
UBBESEN LARS SANDAHL;NIELSEN MICHAEL;RF MICRO DEVICES, INC. |
发明人 |
UBBESEN LARS SANDAHL;NIELSEN MICHAEL |
分类号 |
H03C1/52 |
主分类号 |
H03C1/52 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|