1. H. M. Ahmed, M. Morf, D. T. Lee, and P. H. Ang, A VLSI speech analysis chip set based on square-root normalized ladder forms,Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, Atlanta, vol. 1, pp. 648?653, March 1981.
2. E. Deprettere and P. Dewilde, Orthogonal cascade realization of real multiport digital filters,Circuit Theory and Applications, vol. 8, No. 3, pp. 245?272, July 1980.
3. P. Gomez, V. Rodellar, and R. W. Newcomb, Kemp echo digital filters,Proceedings of the 1st International Conference on Advances in Communications and Control Systems, pp. 38?46, Washington, D.C., June 1987.
4. H. Haznedar,Digital Microelectronics, Benjamin/Cummings, Redwood City, CA, 1991.
5. J. B. Hughes, I. C. Macbeth, and D. M. Pattullo, Switched current filters,IEE Proceedings-G, vol. 137, no. 2, pp. 156?162, April 1990.