Enhanced Noise Shaping ADC With Single Fan out Gated Delay Cells

In modern high-speed data acquisition systems, achieving a high Signal-to-Noise Ratio (SNR) and low Total Har- monic Distortion (THD) is critical. This paper presents a novel time-domain reconfigurable second-order noise-shaping Analog- to-Digital Converter (ADC) architecture that incorporates single fan-out gated delay cells to enhance performance. The proposed ADC leverages time-domain techniques to achieve superior noise shaping characteristics while maintaining flexibility in its con- figuration. The key innovation in our design is the use of gated delay cells with a single fan-out, which enables precise control over timing and reduces power consumption. These delay cells are integral to the ADC’s ability to reconfigure its operation based on the specific requirements of different signal conditions. This adaptability is crucial for optimizing performance across various applications, from low-power sensor interfaces to high- speed communication systems. Simulation results demonstrate that the ADC achieves sig- nificant improvements in SNR and THD compared to con- ventional architectures. The design also exhibits robustness to variations in operating conditions and process variations, making it suitable for integration into diverse electronic systems. The proposed architecture represents a substantial advancement in ADC technology, combining reconfigurability with effective noise shaping to meet the demanding requirements of modern high- performance applications.