Journal ArticleDOI
Application of Volterra series to intermodulation distortion analysis of transistor feedback amplifiers
TLDR
In this paper, the authors analyzed the intermodulation distortion of a solid-state feedback amplifier and showed that the feedback is fully effective in reducing the open-loop second-order distortion.Abstract:
This paper analyzes the intermodulation distortion of a solid-state feedback amplifier. Each transistor of the amplifier has been represented by a frequency-dependent model incorporating four nonlinearities. The Volterra series is used as the analysis tool. The primary motivation for this study is that intermodulation distortion is a critical problem in high-frequency long-haul solidstate systems. A computer program that calculates the amplifier intermodulation distortion has been developed. This program can be used to select the optimum bias point of each stage, optimum interstage and feedback networks, and optimum load and source impedances. Good correlation between calculated and measured results was obtained. The closed-form expressions derived show that the feedback is fully effective in reducing the open-loop second-order distortion and that the feedback may not significantly reduce the open-loop third-order distortion, if the "second-order interaction" phenomenon is dominant. The second-order interaction is explained in detail in this paper.read more
Citations
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A Digital signal processing-based predistortion technique for reduction of intermodulation distortion
TL;DR: The approach presented is unique in that multiple orders of nonlinearity are reduced using DSP technology, at baseband, through a commonly used method of upconversion, resulting in a novel IMD reduction method.
Journal ArticleDOI
Hypothetical simulation of non-linear systems with memory, using an ideal computer with infinite speed and capacity
TL;DR: Algorithms for transient and periodic cases, working simultaneously in the time and frequency domain, are introduced and demonstrated.
Patent
Calculating distortion summaries for circuit distortion analysis
Fangyi Rao,Dan Feng +1 more
TL;DR: In this article, local approximations that do not require high-order derivatives of device models are developed near an operating point for calculating distortion summaries, including compression summaries and second-order intermodulation (IM2) distortions.
Book ChapterDOI
Low-Distortion CMOS Amplifier Design
Frank Op’t Eynde,Willy Sansen +1 more
TL;DR: While the twenty years old Hifi norm required a harmonic distortion of -60 dB, modern audio equipment for compact disks performs at least a dynamic range of a 100 dB, which illustrates the increasing importance of design techniques for low-distortion analog circuits.
References
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Continuous nonlinear systems
TL;DR: In this paper, a thesis submitted to M.I.T. Dept. of Electrical Engineering, July 24, 1959, is described, based on which the following paper is presented:
Journal ArticleDOI
Transistor distortion analysis using volterra series representation
TL;DR: In this article, the second and third harmonic distortion for a given set of input frequencies and transistor parameters is computed using the Volterra series representation, where the nonlinear nodal equations are solved by expressing nodal voltages in terms of the VOLTERRA series expansion of the input voltage.
Journal ArticleDOI
The Use of Functionals in the Analysis of Non-linear Physical Systems†
TL;DR: In this paper, the authors present a systematic development of this idea and present analogous expansions in a series of terms orthogonal with respect to input statistics, which is applicable equally to linear or non-linear systems.
ReportDOI
Theory of the analysis of nonlinear systems
TL;DR: This thesis is based on a thesis submitted to M.I.T. Dept. of Electrical Engineering, January 13, 1958 and aims to provide a history of electrical engineering in the United States.
Journal ArticleDOI
Functional Analysis Applied to Nonlinear Feedback Systems
TL;DR: An operator theory is outlined for the general, nonlinear, feedback loop and it is shown that feedback reduces distortion for band-limited inputs and an iteration whose rate of convergence is optimized is derived.