Taking the Laplace transform on both sides, we get the
following:
Li()[]tCL
dv
dt
=
I(s) =C[sV(s) -v(0)]
Substitute v(0) =V
0
I(s) =C[sV(s) -V
0
]
I(s) =CsV(s) -CV
0
or
Vs
Is
Cs
V
s
()
()
=+
0
(8.3)
This equation can be represented by the circuit shown in
Figure 8.7.
If V
0
= 0,
Vs
Cs
Is
()
()
=
1
(8.4)
If initial capacitor voltage is zero, that is, V
0
= 0, then the equivalent circuit in s-domain will be
as shown in Figure 8.8.
Table 8.1 provides a summary of representation of circuit elements in t-domain and s-domain.
Table 8.1Circuit Elements
Element
t-Domain Circuits-Domain Circuit
s-Domain Equivalent
Circuit (When ...
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