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Simple Circuit Elements
All
simple circuit elements considered in this
unit are classified according to the relationship
of the current through the element to the
voltage across the element.
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For
example, if the voltage across the element
is linearly proportional to the current
through it, we will call the element
a resistor.
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Other
types of elements have terminal voltages
which are proportional to the derivative
of the current with respect to time
(an inductor), or to
the integral of the current with respect
to time (a capacitor).
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In
addition to the above, there are other
elements which supply energy to the
circuit and are called sources.
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A
source in which the voltage is fully
independent of the current or the current
is completely independent of the voltage
is called an independent source.
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Another
kind of source for which either the
source voltage or current depends upon
a current or voltage elsewhere in the
circuit is called dependent
source.
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Dependent sources are
extensively used in electronics to model
transistors, especially in amplifier
circuits.
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Content and Pedagogy© 2004, University of Ottawa,
Faculty of Engineering and Faculty of Education
Design and Production © 2004, University of
Ottawa, Centre for e-Learning
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