A Class of Realizable Maximally Flat Magnitude Driving-Point Functions

Maximally flat magnitude driving-point functions, in spite of easily visualized applications, appear to be less well known than the corresponding transfer functions of Butterworth and other types. This article describes a class of such maximally flat imittances of various order and demonstrates their positive real character. An application is mentioned in which the maximally flat impedance is used as an interstage to achieve a flat amplifier transfer impedance.