Doherty Auxiliary Path Biasing for Low-Power Transmitter Efficiency

The patent applies dynamics by making the bias current adjustable and variable rather than fixed. The bias current is dynamically controlled based on the envelope signal level, allowing the auxiliary path components to adapt their power consumption state (fully on, partially on, or off) according to the instantaneous output power requirements, thus resolving the contradiction between continuous operation and power savings

The patent changes the parameter of bias current from a constant value to a variable value that depends on the envelope signal. By adjusting the bias current parameter based on envelope detection, the system can reduce power consumption in auxiliary path components when high output power is not required, while maintaining the capability to quickly respond when high power is needed

The patent applies local quality by differentiating the operation state of different components based on the local requirement for output power. The auxiliary path components (mixer, LO-buffer, PPA) are controlled independently with envelope-dependent bias currents, allowing them to operate at different power levels or states (on/off) according to the local need for signal processing, rather than all components operating at full power uniformly

The patent applies partial action by providing just enough bias current to the auxiliary path components when low output power is required, rather than full bias current. The envelope-controlled biasing provides partial operation of these components when the auxiliary amplifier is active but output power demand is low, eliminating excessive power consumption while maintaining necessary functionality