A Successive Approximation ADC using PWM Technique for Bio-Medical Applications

Abstract

Analog to digital (A/D) converters provide the interface between the real world (analog) and the digital processingdomain. The analog signals to be converted may originate from many transducers that convert physical phenomena like temperature, pressure or position to elec‐ trical signals. Since these electrical signals are analog voltage or current proportionals to the measured physical phenomena, its necessary to convert them to digital domain to conduct any computational. Nowadays, the development of the IC technology resulted in a growth of digital systems. A/D converters are present in the automotive industry, embedded sys‐ tems and medicine for example. Thus, A/D converters have become important and the large variety of applications implies different types of A/D conversions.