
50
OPERATIONAL AMPLIFIER CIRCUITS: ANALYSIS
AND
DESIGN
The comparator with hysteresis can readily be used in conjunction with
an operational integrator in order to provide a triangular and square-wave gen-
erator as shown in Figure 4-4(a). V
T
will be a triangular wave with nearly
equal positive and negative slopes and V
s
will be a square wave that is positive
during the falling ramp of V
T
and vice versa, as shown in Figure 4-4(b). The
computer program Ramp Gen, Triangular Wave Oscillator Design, (Appendix
A.8,
page 116) enables suitable component values to be determined for partic-
ular operating conditions.
Matching of the positive and negativ ...