SAR Analog to Digital Converter for bio-potential signals: A review

Monitoring of biopotential signals is very crucial in health care systems. With the development of recent CMOS technologies, it is possible to design biomedical ICs for these systems. The fully utilization of energy without sacrificing the performance is desirable for long life of such systems. A large number of systems are built on the basis efficient power consumption in biomedical applications recent days. The SAR ADC is a major part of these systems. This paper reviews different techniques used for design of low power SAR ADC by considering comparator, Sample & hold and DAC as variable components for reducing the power consumption and area.