Design and Simulation of 4 bit- Successive Approximation ADC

Abstract: The digital signal is easy to process than the analog circuits. The design of digital circuits is less complex than the analog circuit. The digital circuit is cheap, robust, stable, less affected by noise and more accurate than analog circuit. The analog to digital converter is bridge between digital and analog. The biomedical and industrial sensor requires powerful analog to digital converter which consume less energy and high speed of operation. In this paper, the four-bit successive approximation ADC is designed which consumes less power with high precision.The converter consists of SAR (Successive Approximation Register), Weighted Register Digital to analog converter and comparator. The simulation of the circuit is implemented and tested into proteus software.

Keywords: Analog to Digital Converter, Successive Approximation Register, simulation.