The output of the operational amplifier in Figure 71 is the integral of the input. This integrator circuit produces an output voltage as follows: -1 O RC CVdt Figure 71. Integrator The input to the integrator shown in Figure is the +-10V, 250 Hz square waveform shown in Figure 73. Knowing that C = 1 F and R = 100k , the output voltage waveform is Figure 72. Integrator -10V Figure 73. Hz square waveform