A Low Voltage High Performance OTA in 0.18 Micron with High Linearity

  • Nikhil Raj
  • Ranitesh Gupta
  • Vikram Chopra
Part of the Communications in Computer and Information Science book series (CCIS, volume 90)


The increasing demand of personal health monitoring products with long battery life had forced designers to use of those circuits which consumes low power. Operational Transconductance Amplifier (OTA) operating in subthreshold (weak inversion) region introduces a versatile solution for the realization of low power VLSI building blocks. This paper demonstrates a modified OTA with high linearity and better performance achieved by using High-swing improved-Wilson current mirror for low power and low-frequency applications. The achieved linearity is about ± 1.9 volt and unity gain bandwidth (UGB) of 342.30 KHz. The OTA is operated at power supply of 0.9 volt and consumes power in range of nanowatts. The OTA simulation has been performed in a standard TSMC 0.18 micrometer technology on BSIM 3v3 model using ELDO Simulator.


Bulk-input Low supply voltage Linear range subthreshold OTA improved Wilson current mirror 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Nikhil Raj
    • 1
  • Ranitesh Gupta
    • 2
  • Vikram Chopra
    • 3
  1. 1.Department of Electronics and Communication Engineering 
  2. 2.Department of Electrical EngineeringNational Institute of TechnologyHaryanaIndia
  3. 3.Department of Electrical and Instrumentation EngineeringThapar UniversityPatialaIndia

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