Transfer Function Synthesis of RC Tunnel-Diode Networks

This paper presents several procedures for the synthesis of various transfer functions by means of networks containing positive resistances, positive capacitances, and a minimum number of ideal tunnel diodes (represented by a parallel combination of a positive capacitor and a negative resistor). Use of tunnel diodes is shown to allow realization of arbitrary transmission zeroes by means of grounded RC tunnel-diode networks. The tunnel diode may be employed either to improve the gain obtainable by passive realization techniques or to synthesize transfer functions that are not
RC
realizable. In addition to a cascade synthesis technique to realize right-half-plane transmission zeroes, a method is presented to realize any voltage transfer ratio with unrestricted transmission zeroes by employing a single tunnel diode.