Title :
A system level model of solid state amplifiers with memory based on a nonlinear feedback loop principle
Author :
Maziere, C. ; Soury, A. ; Ngoya, E. ; Nebus, J.M.
Author_Institution :
IRCOM, UMR CNRS, Limoges, France
Abstract :
This paper presents a new behavioral modeling approach for solid state amplifiers (SSAs) used in communication systems. The model topology consists of the combination of two low pass equivalent transfer functions that process the envelope of the signal. The first one is a nonlinear filter which is well suited to handle short term memory effects. The second one is a nonlinear impulse response that takes into account long term memory effects. In the present paper, the proposed behavioral model is extracted from harmonic balance and envelope simulation results of a BiCMOS LNA and a HBT PA. It is then tested for the prediction of the amplifier response to a 16-QAM signal.
Keywords :
BiCMOS analogue integrated circuits; bipolar analogue integrated circuits; feedback amplifiers; integrated circuit modelling; low noise amplifiers; network topology; nonlinear filters; power amplifiers; transfer functions; transient response; BiCMOS LNA; HBT PA; QAM signal; harmonic balance and envelope simulation; long term memory effects; low pass equivalent transfer functions; nonlinear feedback loop principle; nonlinear filters; nonlinear impulse response; short term memory effects; solid state amplifiers; system level model; BiCMOS integrated circuits; Feedback loop; Nonlinear filters; Power harmonic filters; Predictive models; Signal processing; Solid modeling; Solid state circuits; Topology; Transfer functions;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1608920
