And a method for multi-stage high-efficiency linear power amplifier

摘要

(57) Abstract The power amplifier (10) linear amplification the multiplex conveying signal of noise condition in the range whose power level is wide. The electricity divider (40) splits the input signal because it distributes to three amplifier networks (70,72,74) for individual amplification on the basis of input signal level. Each amplifier network (70,72,74), when efficiency of the front step decreases, in order to respond, is biased. The step configuration which amplifier network (70,72,74) continues expands the efficiency bandwidth of the power amplifier (10). The synthetic vessel (28), each synthesizing the output signal from the amplifier network which is continued, gives the efficiency output which is improved to the load of the power amplifier (10).