Title :
Stability Analysis of RF Power Amplifier Envelope Feedback
Author :
Kheirkhahi, Alireza ; Naghshtabrizi, Payam ; Larson, Lawrence E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California San Diego, La Jolla, CA, USA
Abstract :
Envelope feedback loop stability criteria are derived based on the Lyapunov stability theorem for time-varying systems using the linear matrix inequality technique. Effects of system parameters on stability are investigated. An envelope feedback system is simulated and measured at RF frequencies, and the derived stability boundaries are in good agreement with simulation and measurement results.
Keywords :
circuit stability; feedback; microwave power amplifiers; Lyapunov stability theorem; RF frequencies; RF power amplifier envelope feedback; envelope feedback system; linear matrix inequality technique; stability analysis; system parameters; time-varying systems; Mathematical model; Power amplifiers; Radio frequency; Stability criteria; Time varying systems; Distortion reduction; envelope feedback; linear matrix inequalities (LMIs); radio frequency (RF) power amplifier (PA); stability; state-space model; time-delay; time-varying system;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2011.2172711
