A 2 mA PA Driver Capable of Handling 1μF Load Capacitance with a Three‑Stage Class‑AB Rail‑To‑Rail Amplifier

摘要

In this paper, a three-stage rail-to-rail class-AB amplifier for GaAs/GaN PA driver in radar transmitter components isachieved using a proposed frequency compensation scheme in 0.35 μm CMOS technology. Meanwhile, a negative voltagereference is proposed with low un-trimmed spread by employing level shift technique. The PA driver capable of handlingload capacitance ranging from no load to 1uF only consumes 2 mA of quiescent current while delivering a peak current of100 mA to the load with −90 dB THD. The core area occupies 2.4mm~2.