SINGLE OP-AMP HIGH-ORDER CT ARC-FILTERS FOR OPERATION AT VERY HIGH INTERFERENCE LEVEL IN STOPBAND
G. N. Slavsky, St.Petersburg State Polytechnical University, St.Petersburg, Russia
SYNCHROINFO JOURNAL. Volume 5, Number 2 (2019). P. 17-20.
Abstract
A new approach to the long –appeared problem is considered. The single Op-Amp high-order ARC filters use 2 to 8 times less number of Op-Amps compared to other type ARC filters of the same order. This design pro-vides lower power consumption (important for portable devices, geophysical “in-the-field” or underwater instru-ments), as well as simpler network and technology. Fun-damentally important is the capability of these filters to operate at very high interference level in stop-band, what may be crucial in certain problems of instrumentation. Fil-ters represented below are considered from this point of view. The procedure of the design of certain filters is briefly presented and illustrated with examples.
Keywords: High-Order, Single-Op-Amp, ARC, High in-terference level.
References
[1] G.K.Aggerwal “On using one operational amplifier for nthorder simulation”, Intern. J. Control, 1-st ser., v. 1, no.6, pp. 557-564, 1965.
[2] G.N.Slavski, “Single Op-Amp high-order CT ARC-filters”. Lecture. 1st IEEE Int. Conf. on Circ. and Syst. for Communication. St.Peterburg, Russia, 26-28 June, 2002.
[3] R.Schaumann, M.S.Ghausi and K.R.Laker, Design of analog filters: Passive, active RC, and switched capacitor, Prentice-Hall Int., 1990.
[4] T.Deliyannis, Y.Sun, and J.K.Fidler, Continuous-time activefilter design, CRC Press, USA, 1999.
[5] J.Herreero, G.Willone, Synthesis of filters, Prentice-Hall, inc., Englewood Cliff, N.J.,1966.
[6] A.A.Langin, Design of electrical filters. Zinatne, Riga, 1974.
[7] V.B.Angarkhaeva, V.A.Moskalenko, G.N.Slavski, “Design of 4th order non-cascade LPF”, Selective systems with feedback, Issue V, 1983, Taganrog.
[8] A.E.Znamenski, I.N.Tepljuck, Active RC-filters. Svjaz’. Moskow, 1970.
[9]. G.N.Slavski, “Single Op-Amp High-Order CT Polynomial ARC-filters”. SCS 2003. Int. Symp. On Signal, Circuits and Systems. Iasi, Romania, July 10-11, 2003. Proceedings, vol. 2. P. 349.