b. Response of an RC circuit.

(1) Figure 24 shows the effect of a time constant on an RC

circuit when the period of the square wave (one complete cycle) is

equal to five time constants. Since the pulse rise and decay times

are considered to be zero, the duration time is considered to be

equal to the entire width of the pulse or onehalf the time of a

complete cycle. The duration time, therefore, is equal to 2.5 time

constants. During the second half of the square wave (t2), or the

zero voltage period, the capacitor discharge current flows through

the generator. The resistance encountered in the generator is

considered to be zero.

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