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15 ANALYSIS OF DYNAMIC CIRCUITS BY LAPLACE TRANSFORMS
The initial current at t 0
–
through the inductor was zero and initial voltage
across the capacitor at that instant was zero. There was no impulse content in voltage
at input. Therefore, the inductor current at t 0
+
remains at zero. There was no impulse
current in the circuit. Therefore, the voltage across capacitor remains at zero at t 0
+
.
The time-domain equivalent circuit at t 0
+
is shown in Fig. 15.10-10(a). The initial
value of current i(t) at 0
+
is clearly zero and initial value of v
o
(t) is also zero.
The inductor is replaced by a short circuit and the capacitor by an open-circuit
under ...