Doherty Amplifier Stage Configuration for Stable Gain Switching

The patent applies dynamics by making the amplifier configuration adaptive rather than fixed. The system dynamically switches between different amplifier configurations (Class B/C for high power, Class A/AB for low power) based on the required output power level, allowing the circuit characteristics to change smoothly with the operating conditions rather than experiencing abrupt gain changes.

The patent changes the operating parameters of the amplifiers by switching between different amplification modes. When high output power is needed, the peak amplifier operates in Class B or C mode with higher gain. When low output power is needed, it switches to Class A or AB mode with lower gain, thereby adjusting the gain parameter to match the output power requirement and suppress unnecessary gain changes.

The patent segments the amplification function into two independent parts: the carrier amplifier that handles the base signal, and the peak amplifier that handles the variable power component. This segmentation allows each amplifier to be optimized for its specific function, with the peak amplifier using fewer stages since its primary role is power control rather than full signal processing.

The peak amplifier is designed to perform multiple functions: it provides gain control for high power output, acts as a buffer for low power output, and maintains circuit stability across different operating conditions. This multi-functionality reduces the need for additional dedicated stages, thereby reducing overall device complexity while maintaining linearity.