Journal ArticleDOI
Analysis of Intermodulation Noise in Frequency Converters by Volterra Series
TLDR
In this paper, the Volterra series with time-varying kernels was introduced to treat intermodulation in frequency converters with one two-terminal nonlinearity.Abstract:
Frequency converters produce intermodulation noise in the desired signal band which may be a serious problem for communications systems using amplitude modulation. In this paper, we introduce the Volterra series with time-varying kernels to treat intermodulation in frequency converters with one two-terminal nonlinearity. The method gives exact results up to the order calculated (third order here) for any nonlinearity expressable as a power series, will treat frequency dependence in the nonlinearity as well as the terminations, and leads to a convenient algorithm for computer calculation. The mathematics provides a physical picture of intermodulation of a specific order as being produced by the modulation of lower order products through the nonlinearity. In fact, the solution for a given order of intermodulation currents or charges is the solution of a set of linear equations where the driving functions are intermodulation currents of lower order. A program has been written for the specific but important case of an abrupt junction varactor upconverter. Results for an upconverter that may be used for single-sideband operation in the common carrier microwave band show that the largest contribution to intermodulation comes from currents which are at the sum and difference frequencies of the input (IF) signal corresponding to currents above the input port in frequency and currents in the bias circuitry. This paper documents previously unpublished work (1972) done as part of the exploratory study of single-sideband modulation on long-haul microwave radio transmission.read more
Citations
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Journal ArticleDOI
A bibliography on nonlinear system identification
TL;DR: The present bibliography represents a comprehensive list of references on nonlinear system identification and its applications in signal processing, communications, and biomedical engineering.
Journal ArticleDOI
Intermodulation distortion in current-commutating CMOS mixers
M.T. Terrovitis,Robert G. Meyer +1 more
TL;DR: The nonlinearity behavior of CMOS current-switching mixers is investigated by treating the mixer as a periodically-time-varying weakly nonlinear circuit and the significance of a physical transistor model for reliable distortion simulation is demonstrated.
Journal ArticleDOI
Two-Tone Intermodulation in Diode Mixers
TL;DR: In this paper, the problem of minimizing second and third-order intermodulation distortion in diode mixers is explored experimentally and theoretically, and a numerical technique is presented which can be used to calulate internrodulation levels with unprecedented accuracy, and it is used to identify circuit and diode parameters which maximize dynamic range.
Journal ArticleDOI
Low-distortion MMIC power amplifier using a new form of derivative superposition
D.R. Webster,D.G. Haigh +1 more
TL;DR: In this article, the authors presented a 100mW monolithic-microwave integrated-circuit (MMIC) power amplifier designed using a novel form of the derivative superposition method.
Journal ArticleDOI
Integrated physics-oriented statistical modeling, simulation, and optimization (MESFETs)
TL;DR: In this paper, a large-signal physics-based model is integrated into the harmonic balance equations for simulation of nonlinear circuits, involving an efficient Newton update, and exploited in a gradient-based FAST (feasible adjoint sensitivity technique) circuit optimization technique.
References
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Journal ArticleDOI
Frequency Analysis of Variable Networks
TL;DR: It appears that the frequency domain approach using H(jω; t) possesses significant advantages over the conventional approach using the impulsive response of the network.
Journal ArticleDOI
Volterra systems with more than one input port — distortion in a frequency converter
TL;DR: In this paper, a nonlinear system with memory and two input ports and one output port is considered, and it is assumed that the system can be represented by a double Volterra series.
Journal ArticleDOI
A Large Signal Analysis Leading to Intermodulation Distortion Prediction in Abrupt Junction Varactor Upconverters
S.M. Perlow,B.S. Perlman +1 more
TL;DR: In this article, the authors discussed the relationship between the nonlinear distortion measured by the two tone test and the non-linear gain characteristic and showed that if one is known the other is uniquely determined.
Journal ArticleDOI
Distortion Performance of the Abrupt-Junction Current-Pumped Varactor Frequency Converter
J.G. Gardiner,S.I. Ghobrial +1 more
TL;DR: In this article, an analytical procedure is formulated in which distortion generation and gain saturation effects are seen to arise as a consequence of the interaction of signals, pump, and generated products with the nonlinear capacitance of the varactor.