Electric Circuits and Networks, Ist Edition by Pearson

10.8 UNIT IMPULSE RESPONSE OF SERIES RL CIRCUIT

We look at the response of series RL circuit 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/Δt V located between t  0 and t  Δt as 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 RL circuit first. The circuit

is assumed to be initially relaxed.

The applied pulse ...