Lesson 23 – Signals I (Section 51 through 53, and 57) (CLO 51)
We will now have a change of pace; away from design to developing a repertoire of signals that we will use to
excite circuits and use to represent solutions of circuit behavior.
This is the start of a threelesson block on
signals.
The first lesson is on Singularity functions (impulse, unit step and ramp) and exponentials, the second
lesson is on sinusoids and partial descriptors (V
P
,V
PP
, V
MAX
, V
MIN
, V
AVG
, V
RMS
.) The third lesson is on generating
composite signals using software.
We look at signals now just before we introduce capacitors and inductors –
devices with iv properties that depend on timevarying current or voltage.
Begin the lesson by telling students that we are transitioning from dc signals – rather boring, constant signals,
to the study of ac signals – more exciting signals that vary with time and have the ability to carry information.
In fact, the more unpredictable a signal is the more information it can contain.
We start by looking at
waveforms – the way we describe timevarying signals.
We will look at simple ac signals since we will use
them to understand how circuits behave when driven by them.
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 Spring '08
 MAURICIODEOLIVERIA
 Derivative, Elementary special functions, Exponentials, unit step

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