Ultra-low power Op-Amp design with memristor-based compensation

In this paper, an ultra-low power single output two stage CMOS operational amplifier (Op-Amp) is designed based on using a novel memristor-based compensation technique. Also, a novel memristor programmer is applied for regulating the memristance of the compensation block of the proposed Op-Amp. By applying memristor as a potentiometer, the proposed Op-Amp can regulate its right half plain zero to improve stability and phase margin. Simulation results are presented for proposed ultra-low power single output two-stage CMOS Op-Amp. The two-stage CMOS Op-Amp is designed in 0.18 µm CMOS technology. The proposed Op-Amp exhibits 94 dB DC gain. The unity gain bandwidth (UGB) is 1 MHz and the Op-Amp consumes only 2.7 µW while most transistors are in saturated region. The phase margin of the proposed Op-Amp is 47 degree.

[1]  H. Miar Naimi,et al.  A Novel Low Voltage, Low Power and High Gain Operational Amplifier Using Negative Resistance and Self Cascode Transistors , 2013 .

[2]  Uri C. Weiser,et al.  TEAM: ThrEshold Adaptive Memristor Model , 2013, IEEE Transactions on Circuits and Systems I: Regular Papers.

[3]  A.J. Lopez-Martin,et al.  Low-voltage, low-power rail-to-rail two stage op-amp with dynamic biasing and no Miller compensation , 2007, 2007 50th Midwest Symposium on Circuits and Systems.

[4]  Kyungmin Kim,et al.  Memristor Applications for Programmable Analog ICs , 2011, IEEE Transactions on Nanotechnology.

[5]  Nishant Tripathi,et al.  Low Power Op-Amp Design with Current Compensation Technique , 2013 .

[6]  Yu-Sheng Lai,et al.  A novel OTA with dual bulk-driven input stage , 2009, 2009 IEEE International Symposium on Circuits and Systems.

[7]  B.K. Ahuja,et al.  An improved frequency compensation technique for CMOS operational amplifiers , 1983, IEEE Journal of Solid-State Circuits.

[8]  Jirayuth Mahattanakul.  Design procedure for two-stage CMOS operational amplifiers employing current buffer , 2005, IEEE Transactions on Circuits and Systems II: Express Briefs.

[9]  S.S. Jamuar,et al.  A 0.8V Operational Amplifier using Floating Gate MOS Technology , 2006, 2006 IEEE International Conference on Semiconductor Electronics.

[10]  Massimiliano Di Ventra,et al.  Practical Approach to Programmable Analog Circuits With Memristors , 2009, IEEE Transactions on Circuits and Systems I: Regular Papers.