RF Switched-Capacitor Power Amplifier Modeling

Detailed state-space modeling and analysis of a class of RF switched-capacitor power amplifiers achieving high efficiency, output power, and linearity are presented. Time-domain voltage and current waveforms are analytically obtained via the steady-state solution of the amplifier’s model equations. The output power of the fundamental and that of the harmonics, as well as the drain efficiency of the switched-capacitor power amplifier (SCPA) are derived. The state-space model is implemented in MATLAB and all theoretical results are compared to Cadence Spectre simulation of the SCPA and are found to be in good agreement.

[1]  Jeffrey S. Walling,et al.  A Quadrature Switched Capacitor Power Amplifier , 2016, IEEE Journal of Solid-State Circuits.

[2]  Jeffrey S. Walling,et al.  A Multiphase Switched Capacitor Power Amplifier , 2017, IEEE Journal of Solid-State Circuits.

[3]  Paul-Peter Sotiriadis,et al.  A mathematical model for time-domain analysis and for parametric optimization of a class of switched capacitor RF power amplifiers , 2014, 2014 21st IEEE International Conference on Electronics, Circuits and Systems (ICECS).

[4]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.

[5]  Jeffrey S. Walling,et al.  Digital power amplifier: A new way to exploit the switched-capacitor circuit , 2012, IEEE Communications Magazine.

[6]  Jeffrey S. Walling.  The Switched-Capacitor Power Amplifier: A Key Enabler for Future Communications Systems , 2019, ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference (ESSCIRC).

[7]  A. Scuderi,et al.  A 25 dBm Digitally Modulated CMOS Power Amplifier for WCDMA/EDGE/OFDM With Adaptive Digital Predistortion and Efficient Power Control , 2009, IEEE Journal of Solid-State Circuits.

[8]  Amirpouya Kavousian,et al.  A Digitally Modulated Polar CMOS Power Amplifier With a 20-MHz Channel Bandwidth , 2008, IEEE Journal of Solid-State Circuits.

[9]  David Renshaw,et al.  European Solid-State Circuits Conference (ESSCIRC) , 1987 .

[10]  Shih-Chang Hung,et al.  A Watt-Level Quadrature Class-G Switched-Capacitor Power Amplifier With Linearization Techniques , 2019, IEEE Journal of Solid-State Circuits.

[11]  Jeffrey S. Walling,et al.  A Switched-Capacitor RF Power Amplifier , 2011, IEEE Journal of Solid-State Circuits.

[12]  Jeffrey S. Walling,et al.  A 12 bit split-array switched capacitor power amplifier in 130nm CMOS , 2016, 2016 29th IEEE International System-on-Chip Conference (SOCC).

[13]  R.B. Staszewski,et al.  A digital-to-RF-amplitude converter for GSM/GPRS/EDGE in 90-nm digital CMOS , 2005, 2005 IEEE Radio Frequency integrated Circuits (RFIC) Symposium - Digest of Papers.

[14]  Charles R. Johnson,et al.  Matrix Analysis, 2nd Ed , 2012 .

[15]  Michiel Steyaert,et al.  A state-space behavioral model for CMOS class E power amplifiers , 2003, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..

[16]  P. Lancaster,et al.  The theory of matrices : with applications , 1985 .

[17]  Jacques C. Rudell,et al.  A Class-G Switched-Capacitor RF Power Amplifier , 2013, IEEE Journal of Solid-State Circuits.