A High-Efficiency CMOS Power Amplifier Using 2:2 Output Transformer for 802.11n WLAN Applications

作者：Lee Ockgoo^*; Ryu Hyunsik; Baek Seungjun; Nam Ilku; Jeong Minsu; Kim Bo Eun

来源：Journal of Semiconductor Technology and Science, 2015, 15(2): 280-285.

DOI：10.5573/JSTS.2015.15.2.280

• Power amplifier
• integrated circuit
• transformer
• CMOS
• WLAN

A fully integrated high-efficiency linear CMOS power amplifier (PA) is developed for 802.11n WLAN applications using the 65-nm standard CMOS technology. The transformer topology is investigated to obtain a high-efficiency and high-linearity performance. By adopting a 2:2 output transformer, an optimum impedance is provided to the PA core. Besides, a LC harmonic control block is added to reduce the AM-to-AM/AM-to-PM distortions. The CMOS PA produces a saturated power of 26.1 dBm with a peak power-added efficiency (PAE) of 38.2%. The PA is tested using an 802.11n signal, and it satisfies the stringent error vector magnitude (EVM) and mask requirements. It achieves -28-dB EVM at an output power of 18.6 dBm with a PAE of 14.7%.

• 出版日期2015-4