Matthew Kerwin
::
Circuits Problems
–
Step Response
20V
1kΩ
1µF
20V
5kΩ
v
c
(0
-
) = 20 V
;
i
c
(0
+
) = 4 mA
v
c
(∞) = -20 V
;
i
c
(∞) = 0 mA
τ = 5 ms
v
c
(t) = -20 + 40e
-200t
[V] ; t ≥ 0
time for v
c
to reach 0V: 3.466ms
i
c
(t) = 20 + 4e
-200t
[V] ; t ≥ 0
time for i
c
to reach 0A:
never, but 25ms is close