RC Constant-Argument Driving-Point Admittances

This paper deals with a class of RC driving-point immittances characterized by nearly constant argument over an extended frequency range. These arguments may have an average value between the limits zero and radians. Networks having near constant argument are of importance in shaping the phase character of the forward gain in feedback systems. These networks have arguments that oscillate about a mean value and the nature of this oscillation is discussed. The poles of admittance are geometrically spaced along the negative-real frequency axis, and consequently the elements of the network\´ can be thought of as "spaced." The immittance functions and argument oscillations for the and cases as a function of spacing are fully discussed. An application to a feedback amplifier design is given.