Analog Front-End Circuit Design for the ECG Acquisition System

Abstract

A monolithic analog front-end circuit for ECG acquisition system is described in this thesis. The system includes the instrumentation, which is based on the current balancing technique that ensures this type of circuit to achieve high immunity to common mode signals as first stage, gain amplifier stage and the switched capacitor low pass filter. In order to obtain good performance of the circuit, the non-ideal effect like offset voltage has been analyzed in this thesis. The circuit was implemented in TSMC 0.35μm , 2p4m mixed-signal CMOS technology and it operates at 3.3V power supply .Full custom design flow has been used in this research. Before the fabrication of chips, these circuits had simulated by HSPICE. Good agreement has been found in computer simulation performance.