
Network Functions − s-Domain Analysis of Circuits 411
st
sinwt
e
st
coswt
wt wt
0
Variation of real and image part
0
Figure 10.4(b) Variation of Current i(t) with s > 0
Therefore, we can summarise the concept of the complex frequency s as shown.
We will now proceed to explain network functions in s-domain.
10.2 TRANSFORMED IMPEDANCES IN s-DOMAIN
In this section, we will write the transformed equation in s-domain of impedance and admit-
tance representations of the circuit elements, that is, resistance, inductance and capacitance.
10.2.1 Resistance
In time-domain current and voltage are, respectively, represented as i(t) and v(t), and in
s-domain, ...