Chopper-stabilized Fully Differential Amplifier for Portable ECG Monitoring Systems using 90 nm Technology

This paper concentrate on high-performance chopper-stabilized fully differential amplifier for portable ECG monitoring systems. This fully differential is based on two-stage amplifier and designed for Very high CMRR, low noise, and low power. Transmission gate (TG) transistors are used to perform the Miller compensation technique (Cc) with a nulling active resistance (Rz). In fully differential, the chopper stabilization (CHS) approach is commonly used to reduce the effect of flicker (1/f) noise and DC offset. With threshold voltages of 0.17 V and - 0.14 V, this fully differential was simulated in a SPECTRE utilizing GPDK 90nm CMOS technology, achieve a low power 8.7uW, low noise at 10Hz and very high CMRR up to 300dB at 1 V power supply.