Electronically tunable gain instrumentation amplifier using OTAs

  title={Electronically tunable gain instrumentation amplifier using OTAs},
  author={Amphawan Julsereewong and N. Tananchai and Vanchai Riewruja},
  journal={2008 International Conference on Control, Automation and Systems},
This paper presents a simple method for realizing instrumentation amplifier with ease of gain adjustment. The proposed circuit consists of five operational transconductance amplifiers (OTAs) and two resistors in a balancing circuit. The differential gain of the proposed circuit can be electronically varied by changing the external bias currents of OTAs. The high common-mode rejection ratio (CMRR) can be obtained without requiring matched resistors. Experimental results showing the operational… CONTINUE READING


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