Topological synthesis of RC active circuits using the root-hodograph method

The structural synthesis of RC active circuits on the basis of a prescribed transfer function is considered. The root-hodograph method is used to investigate the functional possibilities of a structure based on a differential operational amplifier and a passive RC multiport for the realization of a general transfer function. Necessary conditions for the realization of the desired transfer function are established along with orders of synthesized polynomials for a class of economical multiloop feedback circuits and ladder circuits.