Dynamic bias circuit of CMOS power amplifier sensing dissipated signals

Abstract

A dynamic bias technology is proposed to meet the linearity standards at high-power levels and simultaneously reduce power consumption at low-power levels for mobile WiMAX terminal application. The dynamic bias circuit makes the bias operate the power amplifier (PA) dynamically as the output power level is increased. The fabricated PA complies with the spurious emission of WiMAX standards up to 20 dBm with improvement in average power usage efficiency by a factor of 5.21 over a fixed bias PA.