1999
DOI: 10.1002/(sici)1099-047x(199911)9:6<490::aid-mmce6>3.0.co;2-d
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A Krylov-subspace technique for the simulation of integrated RF/microwave subsystems driven by digitally modulated carriers

Abstract: This article introduces a new approach to the analysis of nonlinear RF/microwave systems or subsystems described at the circuit level and excited by sinusoidal carriers modulated by arbitrary baseband signals. The circuit is simulated by a sequence of harmonic‐balance analyses based on a Krylov‐subspace method driven by an inexact Newton loop, and suitably modified to account for coupling with a finite number of preceding time instants. The Jacobian matrix of the nonlinear solving system is computed by an exac… Show more

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Cited by 38 publications
(22 citation statements)
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“…It is specifically suitable for analyzing periodic or quasi-periodic circuit responses with slowly varying amplitudes (Feldmann& Roychowdhury, 1996;Kundert et al, 1988;Rizzoli et al, 1999;Silveira et al, 1991;. The principal idea of the HB-based envelope-following analysis is to handle the slowly varying amplitude, called envelope, of the fast carrier separately from the carrier itself, which requires the following mathematical representation of each signal in the circuit…”
Section: Envelope-following Analysismentioning
confidence: 99%
“…It is specifically suitable for analyzing periodic or quasi-periodic circuit responses with slowly varying amplitudes (Feldmann& Roychowdhury, 1996;Kundert et al, 1988;Rizzoli et al, 1999;Silveira et al, 1991;. The principal idea of the HB-based envelope-following analysis is to handle the slowly varying amplitude, called envelope, of the fast carrier separately from the carrier itself, which requires the following mathematical representation of each signal in the circuit…”
Section: Envelope-following Analysismentioning
confidence: 99%
“…Finally, the elastic constant k and the MEMS selfresonant frequency coo are found by structural analysis [3], and the effective mass m is computed as k/c,02. Other nonlinear devices are described by ordinary timedomain equations [5]. The latter and the MEMS equations (1) are then simultaneously solved by the HB technique together with the frequency-domain linear subnetwork equations.…”
Section: Nonlinear Analysis Of Circuits Contain-mentioning
confidence: 99%
“…With this technique, a local multitone HB analysis under RF excitation only is carried out at each envelope-sampling instant, and is backwards-coupled to the preceding ones through the envelope dynamics [5]. Within such framework, ordinary nonlinear devices such as diodes or transistors are normally described by a set of constitutive relations expressing the instantaneous currents and capacitances (or charges) as a function of the applied voltages.…”
Section: Description Of the Behavioral Modelmentioning
confidence: 99%
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“…This unavoidably leads to an intensive use of computer resources, especially in the most important case of digitally modulated RF drive. In order to circumvent this problem, in this paper we propose a new artificial neural network (ANN) based behavioural model that can be easily developed from harmonicbalance (HB) analysis under sinusoidal excitation and provides speedups of several orders of magnitude in system analysis, even with respect to modern envelopeoriented techniques [4]. The model is frequency dependent and fully accounts for nonlinear dispersion effects, thus allowing relatively broadband signals to be accurately handled.…”
Section: Introductionmentioning
confidence: 99%