American Journal of Electrical and Electronic Engineering
ISSN (Print): 2328-7365 ISSN (Online): 2328-7357 Website: Editor-in-chief: Naima kaabouch
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American Journal of Electrical and Electronic Engineering. 2014, 2(6), 175-179
DOI: 10.12691/ajeee-2-6-4
Open AccessLetter To Editor

New Squaring and Square-rooting Circuits Using Cdba

J. K. Pathak1, A. K. Singh2 and Raj Senani3,

1Department of Electronics and Communication Engineering, Echelon Institute of Technology, Faridabad, India

2Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, Sharda University, Ghaziabad, India

3Division of Electronics and Communication Engineering, Netaji Subhas Institute of Technology, Sector 3, Dwarka, New Delhi, India

Pub. Date: December 18, 2014

Cite this paper:
J. K. Pathak, A. K. Singh and Raj Senani. New Squaring and Square-rooting Circuits Using Cdba. American Journal of Electrical and Electronic Engineering. 2014; 2(6):175-179. doi: 10.12691/ajeee-2-6-4


One new squaring and two new square-rooting circuits based on CDBAs have been introduced. The new squarer circuit consists of a CDBA, two NMOS transistors and one resistor. On the other hand, the first square-rooting circuit consists of two CDBAs, two NMOS transistors while the second square- rooting circuit consists of only a single CDBA, two NMOS transistors and two PMOS transistors. The proposed circuits exhibit wide input voltage range, very small error and offer low output impedance to facilitate easy cascading without requiring additional buffers. PSPICE simulation results are included which confirm the practical workability of the new circuits.

squarer square-rooter current differencing buffered amplifier

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[1]  Ismail, M. “Analog VLSI: Signal and Information Processing (International Edition),” McGraw-Hill Inc. 1994.
[2]  Roberts, G. W. and Sedra. A. S., “All current-mode frequency selective circuits,” Electronics Letters, 2. 759-761. 1989.
[3]  Acar, C. and Ozoguz, S., “A new versatile building block: current differencing buffered amplifier suitable for analog signal processing filters,” Microelectronics Journal, 30. 157-160. 1999.
[4]  Acar, C. and Sedef, H., “Realization of nth-order current transfer function using current-differencing buffered amplifiers,” International Journal of Electronics, 90. 277-283. 2003
[5]  Maheshwari, S. and Khan, I. A., “Current controlled current differencing buffered amplifier: Implementations and Applications,” Active and Passive Electronic Components, 4. 219-227. 2004.
[6]  Pathak, J. K., Singh, A. K. and Senani, R., “Systematic realization of quadrature oscillators using current differencing buffered amplifiers,” IET Circuits, Devices and Systems, 5. 203-211. 2011.
[7]  Keskin, A.U., “A Four quadrant analog multiplier employing single CDBA,” Analog Integrated Circuits and Signal Processing, 40. 99-101. 2004.
[8]  Siripruchyanun, M., “A Design of Analog Multiplier and Divider Using Current Controlled Current Differencing Buffered Amplifiers,” International Symposium on Integrated Circuits, 568-571. 2007.
[9]  Lawanwisut, S. and Siripruchyanun, M., “Temperature Insensitive Electronically Controllable Current-mode Squarer Based on CC-CDBAs,” Proceedings of the 1st International Conference on Technical Education (ICTE2009), 225-228. 2009.
[10]  Al-Shahrani, S.M., “CMOS wideband auto-tuning phase shifter circuit,” IET, Electronics Letters, 43. 804-806. 2007.
[11]  Senani, R. and Singh, A. K., “A new Universal Current mode biquad filter”, Frequenz, 56. 55-59. 2002.
[12]  Liu, S.I., “Square-rooting and vector summation circuits using current conveyors,” IEE Proc. Circuits, Devices and Systems. 142. 223-226. 1995.