September 2008
Beginner
834 pages
37h 13m
English
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11.7 IMPULSE RESPONSE OF SERIES RLC CIRCUIT
Impulse response of a circuit is the zero-state response with unit impulse input. The relevant circuit is shown in Fig. 11.7-1(a).
The capacitor cannot absorb the impulse voltage. It cannot absorb even a finite voltage change without infinite current flow, let alone impulse voltage. Resistor cannot absorb impulse voltage, for, in that case the circuit current will become infinite and the inductor is not going to permit that. Hence, the entire impulse voltage appears across the inductor. This results in 1 Wb-T of flux linkage getting dumped into the inductor instantaneously; resulting in a sudden change in its current from zero to 1/L A. Therefore, i(t) at t = 0+ becomes 1/L A and vC(t) at t = 0+ remains ...
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