TY - GEN
T1 - A monolithic 1.85GHz 2-stage sige power amplifier with envelope tracking for improved linear power and efficiency
AU - Wu, Ruili
AU - Li, Yan
AU - Lopez, Jerry
AU - Lie, Donald Y.C.
PY - 2012
Y1 - 2012
N2 - In this paper, a monolithic 2-stage differential power amplifier (PA) is designed and fabricated in the 0.35 m IBM 5PAe SiGe BiCMOS technology where the through-wafer-vias (TWVs) are available. A cascode topology is adopted to relieve the voltage stress for the power stage transistors. All components are integrated on-chip for the PA except the input/output baluns. The envelope tracking (ET) technique is applied to this 2-stage PA to enhance the PAE and linearity for high power-to-average-ratio (PAR) Long-Term-Evolution (LTE) signals. The ET-based PA system achieves a linear output power of 20.4 dBm with a gain of 30.5 dB and an overall system PAE of 22%, using an LTE 16QAM 5 MHz signal with 7.5 dB PAR at 1.85 GHz. Compared to the 2-stage PA operating with fixed voltage supplies, the ET-based PA system improves the linear output power by 3.2 dB and its system PAE by over 10%.
AB - In this paper, a monolithic 2-stage differential power amplifier (PA) is designed and fabricated in the 0.35 m IBM 5PAe SiGe BiCMOS technology where the through-wafer-vias (TWVs) are available. A cascode topology is adopted to relieve the voltage stress for the power stage transistors. All components are integrated on-chip for the PA except the input/output baluns. The envelope tracking (ET) technique is applied to this 2-stage PA to enhance the PAE and linearity for high power-to-average-ratio (PAR) Long-Term-Evolution (LTE) signals. The ET-based PA system achieves a linear output power of 20.4 dBm with a gain of 30.5 dB and an overall system PAE of 22%, using an LTE 16QAM 5 MHz signal with 7.5 dB PAR at 1.85 GHz. Compared to the 2-stage PA operating with fixed voltage supplies, the ET-based PA system improves the linear output power by 3.2 dB and its system PAE by over 10%.
KW - Long-Term-Evolution (LTE)
KW - Real Time Spectrum Analyzer (RSA)
KW - differential cascode PA
KW - envelope tracking (ET)
KW - linear output power
KW - monolithic SiGe BiCMOS power amplifier (PA)
KW - peak-to-average-power-ratio (PAPR)
UR - http://www.scopus.com/inward/record.url?scp=84864041637&partnerID=8YFLogxK
U2 - 10.1109/VLSI-DAT.2012.6212649
DO - 10.1109/VLSI-DAT.2012.6212649
M3 - Conference contribution
AN - SCOPUS:84864041637
SN - 9781457720819
T3 - 2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012 - Proceedings of Technical Papers
BT - 2012 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2012 - Proceedings of Technical Papers
Y2 - 23 April 2012 through 25 April 2012
ER -