제어로봇시스템학회:학술대회논문집

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Electronically adjustable gain instrumentation amplifier

  • Julprapa, A. (King Mongkut´s Institute of Technology Ladkrabang) ;
  • Chaikla, A. (King Mongkut´s Institute of Technology Ladkrabang) ;
  • Ukakimaparn, P. (King Mongkut´s Institute of Technology Ladkrabang) ;
  • Parnklang, J. (King Mongkut´s Institute of Technology Ladkrabang) ;
  • Suphap, S. (King Mongkut´s Institute of Technology Ladkrabang) ;
  • Reiwruja, V. (King Mongkut´s Institute of Technology Ladkrabang)
  • Published : 2001.10.01
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Abstract

In this paper, an instrumentation amplifier, which the voltage gain can be electronically adjusted, is proposed. The realization method is based on the use of operational transconductance amplifiers (OTAs) as active circuit elements. The common mode rejection ratio (CMRR) of the proposed scheme is better than 93dB at the frequency of about 70kHz. The temperature effect to the circuit performance is also compensated. Experimental and simulation results demonstrating the characteristics of the proposed scheme are also included.

Keywords