ADWSystems
Member
I'm looking for (been looking for) a non-inverting comparator circuit where the adjustments of the hysteresis are independent. I know what the typical (LM393) non-inverting comparator with hysteresis looks like and how it works.
Vth1 = Vref + (Vcc - Vref) *R1 / (R1+ R2 + RL)
Vth2 = Vref - (Vref - VoLow) * R1 / (R1 +R2)
Adjusting either R1 or R2 adjusts both Vth1 and Vth2. I'm looking for a similar circuit where Rx effects only VthLow and Ry effects only VthHi. Any one here know of something that fits the bill?
Vth1 = Vref + (Vcc - Vref) *R1 / (R1+ R2 + RL)
Vth2 = Vref - (Vref - VoLow) * R1 / (R1 +R2)
Adjusting either R1 or R2 adjusts both Vth1 and Vth2. I'm looking for a similar circuit where Rx effects only VthLow and Ry effects only VthHi. Any one here know of something that fits the bill?