Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32583
Design of a CMOS Differential Operational Transresistance Amplifier in 90 nm CMOS Technology

Authors: Hafiz Muhammad Obaid, Umais Tayyab, Shabbir Majeed Ch.


In this paper, a CMOS differential operational transresistance amplifier (OTRA) is presented. The amplifier is designed and implemented in a standard umc90-nm CMOS technology. The differential OTRA provides wider bandwidth at high gain. It also shows much better rise and fall time and exhibits a very good input current dynamic range of 50 to 50 μA. The OTRA can be used in many analog VLSI applications. The presented amplifier has high gain bandwidth product of 617.6 THz Ω. The total power dissipation of the presented amplifier is also very low and it is 0.21 mW.

Keywords: CMOS, differential, operational transresistance amplifier, OTRA, 90 nm, VLSI.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 978


[1] K. Kafrawy and A. Soliman, “A modified CMOS differential operational transresistance amplifier (OTRA),” International Journal of Electronics and Communication, vol. 63, pp. 1067–1071, 2009.
[2] H. Mostafa and A. Soliman, “A modified CMOS realization of the operational transresistance amplifier,” Frequenz, vol. 60, pp. 70–76, 2006.
[3] J. Cheng, H. Tsao and C. Chen, “Operational transresistance amplifier using CMOS technology,” Electron Lett, vol. 28, pp. 2087–2088, 1992.
[4] K. N. Salama and A. M. Soliman, “CMOS operational transresistance amplifier for analog signal processing,” Microelectronics Journal, vol. 30, pp. 235-245, 1999.
[5] H. O. Elwan, A. Soliman and M. A. Ismail, “A CMOS norton amplifier based digitally controlled VGA for low power wireless applications,” IEEE Trans Circuits Syst II, vol. 48, pp. 245–254, 2001.
[6] H. O. Elwan and A. M. Soliman, “CMOS differential current conveyors and applications for analog VLSI,” Analog Integrated Circuits and Signal Processing, vol. 11, pp. 35-45, 1996.
[7] S. Mittal, G. Kapur, C. M. Markan and V. P. Pyara, “Analog Field Programmable CMOS Operational Transrsistance Amplifier (OTRA),” Engineering and Systems (SCES) Students Conference, Allahabad, 12-14 April, 2013.
[8] P. E. Allen and Holberg, “CMOS analog circuit design,” HRW, Inc., Orlando, Florida 1987.