Abstract: Amplifying, Digitizing and compressing the signals from the sensors plays an important role in wireless data transmission. Nyquist sampling of bio– medical signals generates large amount of data from a single sensor which is to be stored and compressed by the processor. The proposed data acquisition platform provides amplification and digitisation at the source itself. Operational Trans conductance Amplifier and 1 bit sigma –delta ADC are designed and simulated using LT Spice

Keywords: 1-Bit Sigma-Delta ADC, CMOS Technology, LTspice Tool.