| 摘要 |
This invention relates to a power amplifier device, comprising:
- An amplifier component (A), operable to receive an input signal (s i ) and to provide an amplified output signal (s o ), according to a control signal (ctrl);
- An envelope tracking modulator (ET), providing the control signal (ctrl) according to a static voltage (V s ) and a dynamic voltage (V D );
- A power supply (S) providing said static and dynamic voltages according to measurements performed by a power sensor (PS) on the amplified output signal, so that the static voltage (Vs) is determined as a mean value of the output signal (So) over a predetermined time duration. |
