Parametric Electronics: An Introduction
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Bibliographic Details
Main Author: Löcherer, Karl-Heinz (Author)
Format: Electronic eBook
Language:English
Published: Berlin, Heidelberg Springer Berlin Heidelberg 1982
Series:Springer Series in Electrophysics 6
Subjects:
Online Access:Volltext
Item Description:In this chapter, first the parametric principle is illustrated by two simple examples, one mechanical and one electrical. Then the realization of time­varying reactances is explained, followed by a short history of "parametric electronics". This survey demonstrates the importance of parametric circuits in the field of low-noise microwave electronics as well as explains the organization of this book. 1.1 The Parametric Principle An oscillating system comprising a single or several time-varying energy­storing elements is called a parametric system; usually the variations are harmonic functions of time. Everybody knows one example of a mechanical parametric system from his childhood, namely, a swing. Therefore, we will start with this example though as it turns out, a swing is a rather complicated parametric system. Fortunately, the electrical parametric systems, which form the object of this book, are simpler. Figure 1.1 shows such a swing. If it is removed from its equilibrium position and the child stands on it in a fixed attitude, the swing oscillates with a certain amplitude, the magnitude of which decreases with time due to the mechanical friction of the system. To increase the amplitude of oscillation, the child changes positions during swinging: it crouches and straightens in a certain way twice during one cycle of the swing
Physical Description:1 Online-Ressource (XII, 330 p)
ISBN:9783642679377
9783642679391
ISSN:0172-5734
DOI:10.1007/978-3-642-67937-7

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