A Review on Cascaded NTF Based SDM-ADC Design for VLSI Applications

Analog-to-digital converters are essential for the operation of digital circuits. Signals frequently exhibit fluctuation in response to the surrounding noise environment. Therefore, it is essential to build filters utilizing noise shaping and adaptive noise cancellation. These filters are termed adaptive filters and are utilized in applications necessitating real-time noise cancellation, such as speech processing and live video streaming. The document delineates the architecture of SDM ADCs utilizing recursive encoding. SDM ADCs are utilized to transform high bit-count, low-frequency digital impulses into lower bit-count, higher-frequency digital signals, facilitating the conversion of digital signals into analog within a digital-to-analog converter (DAC). The report examines the many methodologies employed to date, highlighting the advantages and disadvantages of each method. This paper presents the review of contemporary approaches in the domain.