{"title":"Realization of Electronically Controllable Current-mode Square-rooting Circuit Based on MO-CFTA","authors":"P. Silapan, C. Chanapromma, T. Worachak","volume":58,"journal":"International Journal of Electrical and Computer Engineering","pagesStart":1332,"pagesEnd":1336,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/13868","abstract":"This article proposes a current-mode square-rooting\ncircuit using current follower transconductance amplifier (CTFA).\nThe amplitude of the output current can be electronically controlled\nvia input bias current with wide input dynamic range. The proposed\ncircuit consists of only single CFTA. Without any matching\nconditions and external passive elements, the circuit is then\nappropriate for an IC architecture. The magnitude of the output signal\nis temperature-insensitive. The PSpice simulation results are\ndepicted, and the given results agree well with the theoretical\nanticipation. The power consumption is approximately 1.96mW at\n\u00b11.5V supply voltages.","references":"[1] O. E. Doebelin, Measurement Systems: Application and Design, New\nYork: McGraw Hill, 2004.\n[2] S.-I. Liu, \"Square-rooting and vector summation circuits using current\nconveyors,\" IEE Proc. Circuit., Dev. Syst., vol.142, pp. 223-226. 1995.\n[3] V. Riewruja, \"Simple square-rooting circuit using OTAs,\" Electronics\nLetters, vol. 44, pp.1000-1002, 2008.\n[4] C. Netbut, M. Kumngern, P. Prommee and K. Dejhan, \"New simple\nsquare-rooting circuits based on translinear current conveyors,\" ECTI\nTransactions on Electrical Eng., Electronics, and Communication, vol. 5,\n10-17, 2007.\n[5] D. R. Bhaskar, V. K. Sharma, M. Monis and S. M. I. Rizvi, \"New\ncurrent-mode universal biquad filter,\" Microelectronics Journal, vol. 30,\npp. 837-839, 1999.\n[6] C. Toumazou, F. J. Lidgey and D. G. Haigh. Analogue IC design: the\ncurrent-mode approach, London: Peter Peregrinus, 1990.\n[7] H. Schmid, \"Why the terms \u00d4\u00c7\u00ffcurrent mode- and \u00d4\u00c7\u00ffvoltage mode- neither\ndivide nor qualify circuits,\" IEEE ISCAS, pp. II-29-II-32, 2002.\n[8] S. Khucharoensin, and V Kasemsuwan, \"High performance CMOS\ncurrent-mode precision full-wave rectifier,\" IEEE ISCAS, pp. I-41-I-44,\n2003.\n[9] N. Herencsar, J. Koton, I. Lattenberg, and K. Vrba, \"Signal-flow graphs\nfor current-mode universal filter design using current follower\ntransconductance amplifiers (CFTAs),\" In Proceedings of the Applied\nElectronics - APPEL-08, Pilsen, Czech Republic, pp. 113-116, 2008.\n[10] D. Biolek, R. Senani, V. Biolkova, and Z. Kolka, \"Active elements for\nanalog signal processing: classification, review, and new proposals,\"\nRadioengineering, vol. 17, no. 4, pp. 15-32, 2008.\n[11] D. R. Frey, \"Log-domain filtering: an approach to current-mode\nfiltering\", IEE Proceedings of Circuit Devices Systems, vol.140, pp.\n406-416, 1993..","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 58, 2011"}