Continuous-Time Sigma-Delta Modulator Circuit Design Using 130nm CMOS Technology

Abstract

This paper presents a detailed study on the design and implementation of a continuous-time Sigma- Delta (ΣΔ) modulator. The objective of this research is to achieve high-precision analog-to-digital conversion with improved performance in terms of resolution and noise shaping capabilities. The modulator is designed using a two-stage architecture for the operational amplifier (Op-Amp) to enhance power efficiency and space utilization. The paper outlines the design methodology, which involves circuit analysis, component selection, and simulation to optimize the modulator's performance. Various performance metrics are considered, including resolution, signal-to-noise ratio (SNR), distortion, and dynamic range. The designed continuous-time Sigma-Delta modulator is implemented using advanced electronic design automation (EDA) tools, and the performance is evaluated through extensive simulations. The simulations are conducted utilizing standard CMOS technology, and the modulator's behavior is analyzed under different operating conditions.