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Parametric Electronics - An Introduction (Paperback, Softcover reprint of the original 1st ed. 1982)
Loot Price: R2,662
Discovery Miles 26 620
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Parametric Electronics - An Introduction (Paperback, Softcover reprint of the original 1st ed. 1982)
Series: Springer Series in Electronics and Photonics, 6
Expected to ship within 18 - 22 working days
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In this chapter, first the parametric principle is illustrated by
two simple examples, one mechanical and one electrical. Then the
realization of time varying 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 energy storing 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
compli cated 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 oscil lation,
the child changes positions during swinging: it crouches and
straightens in a certain way twice during one cycle of the swing."
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