Help needed ! Explainary for the Comparator circuit. Urgent!

[AlvinTan]

Hi all,

can anyone explain to me how this comparator works? with formulas? any recommendation on which type of softwares suitable to simulation this circuit?

Thanks.

 

[keith1200rs]

There doesn't seem to be much that can be said about it. The CA311 is an equivalent of the LM311 I assume. R128 & VR103 form a potential divider between the +12V and GND to set the threshold voltage on the inverting input. The pullup R129 gives a 5V output (the comparator output is open collector). The strobe pin (6) would normally be left open if the strobe function is not used rather than connected to +12V.

What do you not understand about it?

Keith.

 

[AlvinTan]

with ur explaination, it seem much clearer. appreciated with much thanks.