An Efficient Time-Domain Simulation Method for Multirate RF Nonlinear Circuits

This paper describes a new computer-aided design tool especially conceived for the efficient time-domain simulation of highly heterogeneous nonlinear wireless communication circuits, i.e., combining RF and baseband analog circuitry and digital components. Using multirate Runge-Kutta algorithms withi...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2007-11, Vol.55 (11), p.2384-2392
Main Authors: Oliveira, J.F., Pedro, J.C.
Format: Article
Language:English
Subjects:
Algorithms
Applied sciences
Baseband
Circuit simulation
Circuits
Computational modeling
Computer simulation
Design automation
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Mathematical analysis
Mathematical models
Nonlinear circuits
nonlinear differential equations
Nonlinearity
Radio frequencies
Radio frequency
Runge-Kutta method
simulation
Theoretical study. Circuits analysis and design
Time domain analysis
Voltage
Wireless communication
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Summary:This paper describes a new computer-aided design tool especially conceived for the efficient time-domain simulation of highly heterogeneous nonlinear wireless communication circuits, i.e., combining RF and baseband analog circuitry and digital components. Using multirate Runge-Kutta algorithms within a multi time framework, to benefit from the different rates of variation of slowly varying (latent) and fast-varying (active) currents and voltages (state variables), we managed to solve the envelope transient regime of circuits excited by AM and PM RF carriers, in a highly efficient way. Indeed, with the adoption of convenient sampling rates for the multiple time representations of the slowly varying and fast-varying state variables, gains of more than one order of magnitude in simulation time are reported, even for an illustrative circuit example of very small size.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2007.908679