Design of CMOS Instrumentation Amplifier for ECG Monitoring System Using 0.18 μm Technology

摘要

This paper presents the features of Instrumentation Amplifier for biomedical applications. This Instrumentation Amplifier is a device created from Operational Tran conductance Amplifier. It is designed to have input high impedance , output low impedance, low DC offset, low noise , high common mode rejection ratio and high power supply rejection ratio. The circuit has been integrated in a 0.18μm CMOS technology. Its features are a open loop gain of 20 db with a 0.23KHz bandwidth , CMRR of 124 dB , PSRR of 65 dB, DC offset of 0.3mV .The integrated CMOS amplifier operates to 1.8V power supply . The design and Simulation of this IA is done using CADENCE Spectre environment with UMC 0.18μm technology file. This Instrumentation Amplifier having power dissipation of 0.52 mW.