Amplifier Phase Compensation Circuit for High-Power Linearity

The patent applies dynamics by making the capacitance value adjustable and controllable. The phase compensation circuit uses a controllable capacitor whose capacitance can be dynamically adjusted based on the input signal power level, allowing the compensation amount to adapt to different operating conditions. This resolves the limitation of fixed predistortion by enabling dynamic adaptation to high power phase changes.

The patent changes the capacitance parameter of the compensation circuit based on input power levels. The control circuit adjusts the capacitance value of the controllable capacitor according to the detected input signal power, thereby changing the compensation amount dynamically. This parameter change approach allows effective linearity improvement across different power levels where phase changes vary.

The patent achieves multi-functionality by designing a control circuit that performs multiple functions: detecting input signal power, determining appropriate compensation amounts, and controlling the capacitance adjustment. This single control circuit replaces what would otherwise require separate detection and control mechanisms, improving phase linearity without proportionally increasing circuit complexity.

The phase compensation circuit uses the amplifier's own input signal to generate the control voltage for capacitance adjustment. The detection circuit extracts power level information from the input signal itself, and the control circuit uses this information to automatically adjust the compensation amount. This self-service mechanism eliminates the need for external control signals or complex external control systems.