We look at the response of series RLcircuit in Fig. 10.1-1 with v
S
(t)
δ
(t), the unit impulse
voltage. We have discussed the unit impulse function in detail in an earlier chapter. We saw
that we can view unit impulse function as a limiting case of a rectangular pulse waveform
of amplitude 1/ΔtV located between t 0 and t Δtas Δt≥ 0. The pulse always maintains
unit area under it by increasing the amplitude as its duration decreases. We use this inter-
pretation of unit impulse function to analyse impulse response of RLcircuit first. The circuit
is assumed to be initially relaxed.
The applied pulse ...
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