Figure 41. Differentiator circuit input and output pulses

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Figure 41. Differentiator circuit input and

output pulses

b. The DC voltage indicated in Figure 41B is applied to the RC

differentiator circuit of Figure 41A. After the circuit has reached

its steadystate condition, the rate of change in voltage is zero,

and the differentiated output is zero. The input voltage in Figure

41C has a constant, positive rate of increase. When this voltage is

applied to the differentiator circuit shown in Figure 41A, a constant

DC voltage is obtained at the output. The amplitude of the output

voltage depends on the input voltage rate of change and the time

constant of the circuit. The higher the voltage rate of change, the

greater the DC voltage output. The longer the RC time constant, the

greater the DC output.