Designing a Delta-Sigma Modulator with Low Power Consumption and High Accuracy and Speed Using IIR Filter as NTF Relevant Structure

The article explores the critical need for high-accuracy, high-bandwidth, and power-efficient data converters in modern communication and digital imaging systems. It delves into the advantages of Delta-Sigma modulators, particularly continuous-time modulators, which offer higher speed and lower power consumption compared to their discrete-time counterparts. The study presents a novel design of a Delta-Sigma Modulator that employs an Infinite Impulse Response (IIR) filter as the Noise Transfer Function (NTF) structure, achieving a remarkable balance between low power consumption, high accuracy, and high speed. The article discusses the implementation of a fifth-order double-sampled modulator, which utilizes a combination of integrators and an IIR filter to enhance stability and performance. It also highlights the use of advanced techniques such as Data Weighted Averaging (DWA) and Time Domain Flash Quantizer (TDFQ) to mitigate design challenges and improve linearity. The proposed design is rigorously tested and compared with existing designs, demonstrating superior Signal-to-Noise-and-Distortion Ratio (SNDR) and Signal-to-Noise Ratio (SNR) values. The article concludes with a detailed analysis of the design's performance metrics, including power consumption, bandwidth, and Figure of Merit (FOM), providing a comprehensive overview of its advantages and potential applications in various high-speed, low-power systems.