ABSTRACT
This chapter will include detailed design information for passive RLC filters, including Butterworth, Thomson,
and Chebyshev, both singly and doubly terminated. As the filter slope is increased in order to obtain greater
rejection of frequencies beyond cut-off, the complexity and cost are increased and the response to a step input is
worsened. In particular, the overshoot and the settling time are increased. The element values given are for
normalized low-pass configurations to fifth order. All higher order doubly-terminated Butterworth filter
element values can be obtained using Takahasi’s equation, and an example is included. In order to use this
information in a practical filter these element values must be scaled. Scaling rules to denormalize in frequency
and impedance are given with examples. Since all data is for low-pass filters the transformation rules to change
from low-pass to high-pass and to band-pass filters are included with examples.
