Hi all,
After going thru some papers, I have found that the Vref+ and Vref- are +Vr/4 and -Vr/4 respectively, where Vr is the input signal range. In my case Vr is 0.5,i.e, input varies from -0.5 to +0.5 with a common mode of 1.25V.
So I am setting my comparator thresholds to Vref-=1.25-Vr/4=1.125V and Vref+=1.25+Vr/4=1.375V.
Am I correct in doing so?
How can I get these reference voltages? I know I will have to use bandgap reference. Should I use some kind of resistor divider circuit to get these voltages from the bandgap voltage?
I would appreciate if anyone can help me out.
Thanks.