| 发明名称 |
METHODS OF CALIBRATING A POWER AMPLIFIER SYSTEM TO COMPENSATE FOR ENVELOPE AMPLITUDE MISALIGNMENT |
| 摘要 |
Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment are provided. In certain configurations, a method of calibrating a power amplifier system includes amplifying a radio frequency signal from a transceiver using a power amplifier and generating a supply voltage of the power amplifier using an envelope tracker, including generating a scaled envelope signal based on a power control level signal and an envelope signal, and shaping the scaled envelope signal using a shaping table generated at a target gain compression. The method further includes changing a scaling of the scaled envelope signal using a calibration module, monitoring an output of the power amplifier to determine an amount of scaling of the scaled envelope signal at which a detected gain compression of the power amplifier corresponds to the target gain compression of the shaping table, and calibrating the power amplifier system based on the determination. |
| 申请公布号 |
US2017093505(A1) |
申请公布日期 |
2017.03.30 |
| 申请号 |
US201615377755 |
申请日期 |
2016.12.13 |
| 申请人 |
SKYWORKS SOLUTIONS, INC. ;SNAPTRACK, INC. |
发明人 |
Ripley David Steven;Khesbak Sabah;Bartram Benjamin;Cobley Kevin Lee;Henshaw Robert Astle;Hildersley Julian;Thompson Robert John |
| 分类号 |
H04B17/13;H03F1/56;H03F3/24;H03F1/32;H03F3/19;H03F1/02;H03G3/30 |
主分类号 |
H04B17/13 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of calibrating for envelope amplitude misalignment, the method comprising:
amplifying a radio frequency signal from a transceiver using a power amplifier of a power amplifier system; generating a supply voltage of the power amplifier using an envelope tracker of the power amplifier system, including generating a scaled envelope signal based on a power control level signal and an envelope signal from the transceiver, and shaping the scaled envelope signal using a shaping table generated at a target gain compression; changing a scaling of the scaled envelope signal using a calibration module; monitoring an output of the power amplifier to determine an amount of scaling of the scaled envelope signal at which a detected gain compression of the power amplifier corresponds to the target gain compression of the shaping table; and calibrating the power amplifier system to compensate for envelope amplitude misalignment based on the determined amount of scaling. |
| 地址 |
Woburn MA US |
