• Initial condition:
v(0-) = v(0+) = V0
• Applying
KCL,
•
•
•
•
or
•
•
•
•
• Where u(t)
is the unit-step
function
7.4
The Step-Response
of a RC Circuit (1)
•The step
response of a circuit is its
behavior when the excitation is the step function, which
may be a voltage or a current source.