Ultra low-power rail-to-rail linear sub-threshold bulk-driven transconductor

In this paper a novel low-voltage and low-power rail-to-rail linear operational transconductance amplifier (OTA), operating in sub-threshold region is presented. The source degenerated bulk-driven input stage ensures rail-to-rail operation with enhanced linearity. To enhance its transconductance and current drive capability a regenerative feedback at input transistor's gates has been employed. The OTA operating at 0.5 V supply ensured total harmonic distortion (THD) <; -40 dB. The circuit provides 43 dB gain and 90 kHz gain bandwidth product. The Tanner EDA 15.0 simulation tool environment using 0.18 μm CMOS process technology has been used to simulate the proposed circuit. Simulation results show that with supply of one threshold order, circuit consumes 292 nA current and 146 nW power and exhibits less than -65 dB total harmonic distortions, for 100 mV(p-p) signal at 200 Hz frequency in its unity gain configuration.

[1]  Joel Gak,et al.  Nanopower OTAs With Improved Linearity and Low Input Offset Using Bulk Degeneration , 2014, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  J. Francisco Duque-Carrillo,et al.  Transconductance enhancement in bulk-driven input stages and its applications , 2011 .

[3]  Jui-Lin Lai,et al.  Using Bulk-driven Technology Operate in Subthreshold Region to Design a Low Voltage and Low Current Operational Amplifier , 2006, 2006 IEEE International Symposium on Consumer Electronics.

[4]  M. Sawan,et al.  Design of 0.4V, 386nW OTA using DTMOS technique for biomedical applications , 2012, 2012 IEEE 55th International Midwest Symposium on Circuits and Systems (MWSCAS).

[5]  Tomasz Kulej Low voltage low transconductance OTA in 50 nm CMOS , 2010, ICSES 2010 International Conference on Signals and Electronic Circuits.

[6]  Tomasz Kulej,et al.  0.5-V bulk-driven CMOS operational amplifier , 2013, IET Circuits Devices Syst..

[7]  Samad Sheikhaei,et al.  A 0.9 V Supply OTA in 0.18 μm CMOS Technology and Its Application in Realizing a Tunable Low-Pass Gm-C Filter for Wireless Sensor Networks , 2013 .

[8]  Dalibor Biolek,et al.  Utilizing the Bulk-driven technique in analog circuit design , 2010, 13th IEEE Symposium on Design and Diagnostics of Electronic Circuits and Systems.

[9]  Robson L. Moreno,et al.  An Ultra-Low-Voltage Ultra-Low-Power CMOS Miller OTA With Rail-to-Rail Input/Output Swing , 2007, IEEE Transactions on Circuits and Systems II: Express Briefs.

[10]  M. Razzaghpour,et al.  An ultra-low-voltage ultra-low-power OTA with improved gain-bandwidth product , 2008, 2008 International Conference on Microelectronics.

[11]  Tohid Moosazadeh,et al.  A single-stage operational amplifier with enhanced transconductance and slew rate for switched-capacitor circuits , 2014 .

[12]  D.M. Binkley,et al.  Tradeoffs and Optimization in Analog CMOS Design , 2008, 2007 14th International Conference on Mixed Design of Integrated Circuits and Systems.

[13]  Guido Torelli,et al.  1-V Rail-to-Rail CMOS OpAmp With Improved Bulk-Driven Input Stage , 2007, IEEE Journal of Solid-State Circuits.

[14]  Phillip E Allen,et al.  CMOS Analog Circuit Design , 1987 .

[15]  Giuseppe Iannaccone,et al.  Design of a 75‐nW, 0.5‐V subthreshold complementary metal–oxide–semiconductor operational amplifier , 2014, Int. J. Circuit Theory Appl..

[16]  G. Torelli,et al.  1-V rail-to-rail bulk-driven CMOS OTA with enhanced gain and gain-bandwidth product , 2005, Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005..

[17]  Izzet Kale,et al.  Design of a 0.8 Volt fully differential CMOS OTA using the bulk-driven technique , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[18]  P. Kinget,et al.  0.5-V analog circuit techniques and their application in OTA and filter design , 2005, IEEE Journal of Solid-State Circuits.

[19]  Syed Kamrul Islam,et al.  Low-Voltage Bulk-Driven Operational Amplifier With Improved Transconductance , 2013, IEEE Transactions on Circuits and Systems I: Regular Papers.

[20]  Apinunt Thanachayanont,et al.  Sub 1-V highly-linear low-power class-AB bulk-driven tunable CMOS transconductor , 2013 .

[21]  Sameer R. Sonkusale,et al.  A 60-dB Gain OTA Operating at 0.25-V Power Supply in 130-nm Digital CMOS Process , 2014, IEEE Transactions on Circuits and Systems I: Regular Papers.