OKAWA Electric Design
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Comparator circuits with Hysteresis Design Tool

This page is a web application that design a comparator circuit with hysteresis. Use this utility to find the optimum resistors for hysteresis circuit from the resistor sequence.


Sample calculation

for a open collector(drain) output of comparator


Select Resistor Sequence:
Vref:V
V1:V
V2:V
Vout(Low):V (comparator output at saturation Low voltage)


for a push-pull output of comparator


Select Resistor Sequence:
Vref:V
V1:V
V2:V
Vout(Hi):V (comparator output at saturation Hi voltage)
Vout(Low):V (comparator output at saturation Low voltage)


Hysteresis voltage calculation


R1 = [Ω] R2 = [Ω]
R3 = [Ω]

Vref= [V]
Vout(Lo)= [V]
Vout(Hi)= [V](for a push-pull output)

Output type

open collector(drain)     push-pull


V1 = 
V2 =