Noise Shaping SAR ADC Using 2nd order Passive Integrator

A wide description of Noise-Shaping (NS) Successive Approximation Register (SAR) Analog-toDigital converters (ADC) is presented, which includes basic concepts, functional rules, and essential NS SAR layouts. The NS SAR additionally does zeros minimization on the Noise Transfer Function (NTF). The projected technique improves the Signal-to-Noise Ratio (SNR) of the suggested NS SAR ADC model by lowering the kT/C noise and the rate of conversion. The whole design is simple and sturdy, requiring just modest changes to the typical SAR ADC. This brief suggests a comparator-based 2nd order proposed model that utilizes two distinct passive integrators. The layout of fluid comparators is discussed, emphasizing its importance in the SAR ADC scheme. The suggested ADC has a maximum Schreier figure of qualities (FoMs) of 171.9 dB, a 78.69-dB Signal-to-Noise-and-Distortion Ratio (SNDR), and an Over-Sampling Ratio (OSR) of 8.