A DIGITAL POWER AMPLIFIER APPLIED TO LOW VOLTAGE CARRIER COMMUNICATION

摘要

A digital power amplifier of low voltage carrier communication includes a power level drive circuit , a band pass filter and a transformer. The amplifier further includes: an upsampling filter for converting a low voltage carrier digital signal to be amplified to higher sampling frequency; a noise shaping circuit for removing the noise of the low voltage carrier digital signal and outputting two difference signal ; a dead area control circuit for processing the two difference signal into two overlapping offset noise respectively; the input end of the noise shaping circuit connects to the output end of the upsampling filter, and the output end of the noise shaping circuit connects to input end of the dead area control circuit, and the output end of the dead area control circuit connects to the input end of the power level drive circuit.