A Class-E PA With Pulse-Width and Pulse-Position Modulation in 65 nm CMOS
- 27 May 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 44 (6), 1668-1678
- https://doi.org/10.1109/jssc.2009.2020205
Abstract
A class-E power amplifier (PA) utilizes differential switches and a tuned passive output network improves power-added efficiency (PAE) and insensitivity to amplitude variations at its input. A modulator is introduced that takes outphased waveforms as its inputs and generates a pulse-width and pulse-position modulated (PWPM) signal as its output. The PWPM modulator is used in conjunction with a class-E PA to efficiently amplify constant envelope (e.g., GMSK) and non-constant envelope (e.g., QPSK, QAM, OFDM) signals with moderate peak-to-average ratios (PAR). The measured maximum output power of the PA is 28.6 dBm with a PAE of 28.5%, and the measured error vector magnitude (EVM) is 1.2% and 4.6% for GMSK and pi/4-DQPSK (PAR ap 4 dB) modulated signals, respectively.Keywords
This publication has 19 references indexed in Scilit:
- A 28.6dBm 65nm Class-E PA with Envelope Restoration by Pulse-Width and Pulse-Position ModulationIEEE International Solid-State Circuits Conference, 2008
- Analysis of Reliability and Power Efficiency in Cascode Class-E PAsIEEE Journal of Solid-State Circuits, 2006
- A 1.75-GHz polar modulated CMOS RF power amplifier for GSM-EDGEIEEE Journal of Solid-State Circuits, 2005
- An all-digital universal RF transmitter [CMOS RF modulator and PA]Published by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Fully integrated CMOS power amplifier design using the distributed active-transformer architectureIEEE Journal of Solid-State Circuits, 2002
- A common-gate switched 0.9-W class-E power amplifier with 41% PAE in 0.25-μm CMOSIEEE Journal of Solid-State Circuits, 2001
- Class E Power Amplifiers and Frequency Multipliers with finite DC-Feed InductanceIEEE Transactions on Circuits and Systems, 1987
- Transistor power losses in the class E tuned power amplifierIEEE Journal of Solid-State Circuits, 1978
- Effects of circuit variations on the class E tuned power amplifierIEEE Journal of Solid-State Circuits, 1978
- Idealized operation of the class E tuned power amplifierIEEE Transactions on Circuits and Systems, 1977