Below
are concepts and
explanation of
apps that support
Lab. VI.
The objective of
this lab is to
study the
amplitude and
phase relationship
of harmonic input
and output of
simple linear
circuits. You may
or may not have
learned Fourier
analysis. But here
is the basic idea:
A signal s[t] can
be expressed as a
sum of many
(infinite)
sinusoidal
functions. To
analyze the output
of s[t] through a
circuit, it is
simpler to find
out what happens
to each component
sinusoidal
function rather
than the whole
complicated signal
s[t]. Each
sinusoidal
function is called
a harmonic. For
most circuits,
which are linear,
the output of a
harmonic is also a
harmonic of the
same frequency,
with a change in
amplitude and
phase. This is
referred to as a
phasor.
If we know the
output of each
harmonic component
of signal s[t], we
can add all of
them up and get
the output of
s[t].
In this lab, you
will measure the
phasor output of
an input harmonic
signal, which is
the change in
amplitude and
phase relative to
the input. The
oscilloscope you
use has nice
built-in functions
to do this.
