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Equation for Type Compensator

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Vout=VRef·[(1/Rbias+1/R1)*Z2+1]-Vin*Z2/R1
Z2=C2 in parallel with (R2 in series with C1)
 

How is Vout related to frequency? Any reference for the derivation?
 

Thanks. I wonder why Vref does not appear in transfer function of type 2 transfer function?
 

No, I was referring to the document in the link mentioned in post 1(page 11) where location of pole and zero do not depend on Vref
 

You are right. Vref is DC. post #2 is wrong. Place 0V at the inverting input and recalculate.
 

Adding to the above question, a type 2 compensator has 1 pole at origin and a pole zero pair spread out. Since it has pole at origin, at DC, gain must must be infinity. Does the zero location compensate for the pole at origin. I do not see placement of zero near the origin but placed away. Please clarify
 

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