Hi, I'm trying to find UTP and LTP from Vth, Vout
, VDC, R1, R2, and R3. I have V(+) but that is all.




http://forum.allaboutcircuits.com/attachment.php?attachmentid=23185&d=1286304832

 

Calculate V+ when Vo is high. Calculate V+ when Vo is low. The results are UTP and LTP, respectively.