The Maplin Electronic Circuits Handbook, 2nd Edition

COMPARATORS 119

Figure 5.37 Operational

differentiator

Figure 5.38 Operational

integrator

Figure 5.39 Representative

waveforms

for the circuit shown

in Figure 5.37

Figure 5.40 Representative

waveforms

for the circuit shown

in Figure 5.38

Where t is the periodic time of the input voltage.

Conversely, the criterion for achieving effective integration of a wave-

form by the circuit of Figure 5.38 is that:

t » C χ R

Where t is the periodic time of the input voltage.

Comparators

One final application of operational amplifiers is worthy of mention. This

usually involves the device operating in an open-loop configuration (i.e.

without negative feedbac ...