W Winterstone Banned Apr 3, 2012 #2 If all three elements are in series you have a simple RC high pass with a time constant T=(R1+R2)*C=RC. Thus the corner frequency is wo=1/T. Of course, you get the same result using the high pass transfer function H(s)=R2/(R+1/sC)=sC*R2/(1+sRC) with R=R1+R2.
If all three elements are in series you have a simple RC high pass with a time constant T=(R1+R2)*C=RC. Thus the corner frequency is wo=1/T. Of course, you get the same result using the high pass transfer function H(s)=R2/(R+1/sC)=sC*R2/(1+sRC) with R=R1+R2.