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
considered to be zero.