Sigma-Delta(Σ-Δ)Analog-to-Digital Converter(ADC)is based on oversampling and noise shaping techniques to achieve high-resolution,and is characterized by low passive component matching requirements and simple structure.In high-resolution audio applications,Σ-Δ ADC has gained widespread attention and applications since it can achieve high dynamic range with good power efficiency.Recently,there has been a growing research trend in designing low-power,high-resolution audio ADCs using advanced processes and technologies.However,with process technology going to lower nodes and the reduction of supply voltages,the circuit design becomes more challenging.This paper reviews the state-of-the-art of the discrete-time and continuous-time design of high-resolution audio Sigma-Delta modulators,provides theoretical background for the design of high-resolution audio Sigma-Delta modulators,and gives research prospects.
维普
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