A 20-mA quiescent current two-stage W-CDMA power amplifier using anti-phase intermodulation distortion

@article{Aoki2004A2Q,
  title={A 20-mA quiescent current two-stage W-CDMA power amplifier using anti-phase intermodulation distortion},
  author={Yasuhiro Aoki and Kazuaki Kunihiro and Tetsuya Miyazaki and Toshikazu Hirayama and Hikaru Hida},
  journal={2004 IEE Radio Frequency Integrated Circuits (RFIC) Systems. Digest of Papers},
  year={2004},
  pages={357-360}
}
This paper explains how the adjacent-channel-leakage-power ratio (ACLR) of power amplifiers (PAs) can be reduced by using gain-expansion amplifiers in tandem and generating anti-phase intermodulation distortion (IMD) in the driver stage to cancel the IMD in the output stage. The power-added-efficiency (PAE) can thus be increased by using near-class-B-biased driver- and output-stage amplifiers, which inherently have gain-expansion characteristics and high PAE at low output power as well as at… CONTINUE READING