5
9.2 Sinusoids
(2)
A periodic function is one
that satisfies v(t) = v(t + nT), for all t and for all
integers n.
•Only
two sinusoidal values with the same frequency can
be compared by their
amplitude and phase difference.
•If phase difference is zero, they
are in phase; if phase difference is not zero, they are out of phase.