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Compensation of loop delay in a continuous-time Delta Sigma modulator through HRZ DAC feedback

机译:通过HRZ DAC反馈来补偿连续时间ΔSigma调制器中的循环延迟

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A Continuous-Time Delta-Sigma Modulator is presented for high resolution audio frequency applications with a sampling frequency of 6.5MHz and a signal bandwidth of 10KHz. Traditionally, such architectures suffer from the issue of ‘loop-delay’, which arises due to various non-idealities present in the circuit. The presented design addresses this problem by using Half-Delayed Return-to-Zero feedback signaling, as opposed to the prevalent Non-Return-to-Zero feedback signaling. The integrated circuit was designed and simulated in 250nm CMOS technology. The results show an improvement of 33.3dB in Signal-to Noise Ratio and stable loop output as compared to traditional architectures.
机译:为高分辨率音频应用提供连续时间Δ-Sigma调制器,采样频率为6.5MHz和10KHz的信号带宽。 传统上,这种架构遭受&#x2018的问题;环延迟’由于电路中存在的各种非理想而产生的。 所提出的设计通过使用半延迟的返回到零反馈信令来解决这个问题,而不是普遍的非返回到零反馈信令。 集成电路在250nm CMOS技术中设计和模拟。 与传统架构相比,该结果显示出33.3dB的信号 - 信噪比和稳定的环路输出。

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