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Electronically tunable gain instrumentation amplifier using OTAs
Author(s)
Date Issued
December 1, 2008
Type
Conference Paper
Abstract
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 characteristics of the proposed circuit are included.
Citation
2008 International Conference on Control Automation and Systems Iccas 2008, 1820-1823, 2008