A fully-integrated quad-band GSM/GPRS CMOS power amplifier

FREE-DOWNLOAD I Aoki, S Kee, R Magoon, R Aparicio… – Solid-State Circuits, …, 2008

Abstract—Concentric distributed active transformers (DAT) are used to implement a fully-integrated
quad-band power amplifier (PA) in a standard 130 nm CMOS process. The DAT enables the
power amplifier to integrate the input and output matching net- works on the same silicon