Stability Analysis of RF Power Amplifier Envelope Feedback

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, an...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2011-12, Vol.58 (12), p.852-856
Main Authors: Kheirkhahi, A., Naghshtabrizi, P., Larson, L. E.
Format: Article
Language:English
Subjects:
Boundaries
Circuits
Distortion reduction
envelope feedback
Envelopes
Feedback
Feedback loops
linear matrix inequalities (LMIs)
Mathematical model
Power amplifiers
Radio frequencies
Radio frequency
radio frequency (RF) power amplifier (PA)
Simulation
Stability
Stability criteria
state-space model
Time varying systems
time-delay
time-varying system
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Summary: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.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2011.2172711