Determination of Parameters for third Order Sallen-Key Circuit

Third order Sallen-Key circuit:        

Input parameters are the three poles of the transfer function. An analysis ot the third order Sallen-Key circuit is given here (an additional page is opened).

complex poles: p_1/3 = ± j
    real pole:       p₂ =

The resistor values of the third order Sallen-Key circuit having K=2 (i.e. R_A =R_B) are given by:

The normalised capacitor values all have unity (i.e. value 1).