A Simple Square Rooting Circuit Based on Operational Amplifiers (OPAMPs)


  • K. C. Selvam Department of Electrical Engineering, Indian Institute of Technology Madras, India
  • S. Latha Department of Electrical Engineering, Indian Institute of Technology Madras, India
Volume: 3 | Issue: 1 | Pages: 349-351 | February 2013 | https://doi.org/10.48084/etasr.234


A simple circuit which accepts a negative voltage as input and provides an output voltage equal to the square root of the input voltage is described in this paper. The square rooting operation is dependent only on the ratio of two resistors and a DC voltage. Hence, the required accuracy can be obtained by employing precision resistors and a stable reference voltage. The feasibility of the circuit is examined by testing the results on a proto type.


square-rooting, generators, comparators, switches, low-pass filters


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E. O. Doebelin, Measurement systems: application and design, Mc Graw Hill, New York, 2004

M. A. Atmanand, “Novel Schemes for impedance measurement and their implementation through electronic circuits”, Ph.D Thesis, IIT Madras, 1996

S. I. Liu, “Square-rooting and vector summation circuits using current conveyors”, IEE Proc. Circuits., Dev. Syst., Vol. 142, No. 4, pp. 223-226, 1995 DOI: https://doi.org/10.1049/ip-cds:19951951

V. Riewruja, “Simple square rooting circuit using OTAs”, Electronics Letters, Vol. 44, No. 17, pp. 1000-1002, 2008 DOI: https://doi.org/10.1049/el:20081739

C. Netbut, M. Kumngern, P. Prommee, K. Dejhan, “New simple square rooting circuits based on translinear current conveyors”, ECTI Tranasactions on Elecrtrical Eng., Electronics and Communication, Vol. 5, No. 1, pp. 10-17, 2007

W. Tangsrirat, T. Pukkalanun, P. Mongkolwai, W. Surakampontorn, “Simple current mode analog multiplier, divider, square-rooter and square based on CDTAs”, AEU-Int. J. Electron. Commun., Vol. 65, No. 3, pp. 198-203, 2011 DOI: https://doi.org/10.1016/j.aeue.2010.02.017

P. Mongkolwai, D. Prasertsom, W. Tangsrirat, “CFTA- based current controlled current amplifier and its application”, 25th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2010), Pattaya, Thailand, 2010


How to Cite

K. C. Selvam and S. Latha, “A Simple Square Rooting Circuit Based on Operational Amplifiers (OPAMPs)”, Eng. Technol. Appl. Sci. Res., vol. 3, no. 1, pp. 349–351, Feb. 2013.


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