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Published July 1985 | public
Journal Article

A General Theory and Synthesis Procedure for Low-Sensitivity Active RC Filters

Abstract

The fundamental requirements for low-sensitivity analog filter structures are shown to be the bounded-real (BR) property of the transfer function and its implementation by a structure that "preserves" the BR property for incremental changes in the parameters of the network. Using these properties, a low-sensitivity realization of any stable BR analog transfer function is developed. The final structure is in the form of a singly constrained analog active RC "two-pair" implemented as a cascade of two-pairs where each two-pair is characterized by a lossless bounded-real (LBR) transfer matrix. The proposed theory is shown to include the class of low sensitivity wave active RC structures related to the doubly terminated lossless two-ports. The new theory has been verified by computer simulation.

Additional Information

© 1985 IEEE. Manuscript received January 6, 1984; revised October 29, 1984. This work was initiated at the Australian National University in 1982 where one of the authors (S. K. Mitra) was on a sabbatical leave, and the university's support is greatly appreciated. The authors would like to thank Prof. John B. Moore of The Australian National University, Canberra, for useful discussion. The authors also thank Prof. Gabor C. Temes of the University of California, Los Angeles, for his constructive criticisms.

Additional details

Created:
August 19, 2023
Modified:
October 17, 2023