A multi-band power amplifying means

The present invention provides a multi-band power amplifying means can be both linear and improve efficiency requirements. The apparatus further comprises a first input terminal, a second input terminal, a first adjusting module adjusting a second module, a first adder and a second adder; a first output to a first input terminal for receiving the digital signal of the frequency band is f1 predistortion module; a second input terminal for receiving an output of the band pre-distortion module to the rear f2 of the second digital signal; adjusting a first module for the first channel signal output to the first adder adjusted; the third second adjustment module It outputs the adjusted signals to the first adder; a first digital to analog converter to the output of the signal merging a first adder adds the second adjustment module adjusts the signals output from the first adjustment module; a second adder adds the first Road channel signal and the fourth signal to the second digital post-confluence. The apparatus may be designed to improve the performance of cross-band amplifier, amplifier types reduction, cost reduction.