Title :
Transformer based dual-power-mode CMOS power amplifier for handset applications
Author :
Yunsung Cho ; Byungjoon Park ; Sangsu Jin ; Jooseung Kim ; Kyunghoon Moon ; Daehyun Kang ; Hadong Jin ; Seungbeom Koo ; Bumman Kim
Author_Institution :
Div. of IT Convergence Eng., Pohang Univ. of Sci. & Technol., Pohang, South Korea
Abstract :
A fully integrated transformer based dual-power-mode CMOS power amplifier (PA) is implemented. The proposed architecture provides enhanced back-off efficiency with simple circuit topology. With broadband characteristic of the transmission line transformer, the PA delivers good performance across the 1.7-2.0 GHz frequency band. The PA with a 3.5 V supply voltage has gains of 14.5-16.2 dB and 10-10.5 dB in high power mode (HPM) and low power mode (LPM), respectively. The linear average output power for long-term evolution signals having 10-MHz bandwidth and 7.5 dB peak-to-average power ratio is 26/20 dBm with a PAE of 31.6%-33.8%/20.8%-26.5% across the 1.7-2.0 GHz frequency in the HPM/LPM.
Keywords :
CMOS integrated circuits; Long Term Evolution; UHF power amplifiers; low-power electronics; network topology; transformers; transmission lines; circuit topology; dual power mode CMOS power amplifier; frequency 1.7 GHz to 2.0 GHz; fully integrated transformer; gain 14.5 dB to 16.2 dB; handset applications; long-term evolution signals; low power mode; transmission line transformer; voltage 3.5 V; CMOS integrated circuits; Frequency measurement; Gain; Harmonic analysis; Peak to average power ratio; Power generation; Switches;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986702
