Patent ID: 7817973

Claim:
A method for high-efficiency radio frequency (RF) power amplification, comprising the steps of: receiving, from one or more inputs of a subsystem, control and power signals comprising RF power input signal to the subsystem, power control signal representing real time required output power of the subsystem, and output power range signal specifying a required output power range of the subsystem among a plurality of pre-determined required output power ranges, wherein the subsystem transmits data during consecutive transmission time slots separated by guard time during which no data is transmitted; sampling power output at an amplifier output of a main stage amplifier in the subsystem to generate signal representing the output power; comparing, using a comparator, the signal representing the output power with the power control signal to generate first biasing information; receiving the output power range signal during guard time prior to an upcoming transmission time slot of the consecutive transmission time slots, wherein the specified required output power range corresponds to a requirement of the power output for the upcoming transmission time slot; generating, using a power level interface circuit, second biasing information based on the specified required output power range; reconfiguring, using a bias network control circuit based on the first and second biasing information and during guard time prior to the upcoming transmission time slot, bias of an amplifier block to meet a pre-determined output power time template, wherein the amplifier block comprises the main stage amplifier; coupling the amplifier output to a load mismatch protection circuit, wherein the load mismatch protection circuit monitors real time load variation at a subsystem output for making adjustment to provide a well-controlled impedance within a specified range to the amplifier output; and amplifying the RF power input signal using the amplifier block.