Voltage Standing Wave Ratio.

The attenuation depends on the order n of the
filter : 20n dB/decade.

- f : is the cut-off or corner frequency in Hz.
- : is the source load and it must be equal to the load value in Ω.
__R__In the Butterworth design the load is always matched to the source. - : is the order of the filter and it is equal to the number of components.
__n__In the simulator n is ≦15. - i : is the component number, odd for shunt capacitor and even for series inductor.

- f : is the in Hz .
__ripple frequency__Not the cut off frequency - : is the source resistance value in Ω.
__R__In the Chebyshev design the load is matched to the source when the order of the filter is odd. - n : is the of the filter and it is equal to the number of components.
__order__In the simulator n is ≦15. - i : is the component number, odd for shunt capacitor and even for series inductor.
- A
_{r}: is the pass band ripple in dB.