A Smart Noise-Coupling Technique for low power DT-Σ∆ Modulators

International Journal of Smart Electrical Engineering

دوره 11، شماره 01، خرداد 2022، صفحه 35-40

نوع مقاله: Research Paper

نویسندگان

Habibeh Fakhraie¹؛ Tohid Moosazadeh^{* 2}؛ Reza Sabbaghi-nadooshan²؛ Alireza Hassanzadeh³

¹Department of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

²Department of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

³ECE Department, Shahid Beheshti University, Tehran, Iran

چکیده

In this paper, a new method for extending and relaxing the noise-coupling (NC) technique is proposed to enhance the noise-shaping order without adding the number of integrators. The noise-shaping order of the introduced ∑∆ modulator whit applying a second-order noise-coupling technique is enhanced and its performance with optimizing the noise transfer function (NTF) zeros is improved. Also, by removing the analog adder at feedforward path and transferring it to a new feedback branch before the last integrator and adding second-order NC path can be decreased the input voltage swing to the quantizer. Thus, by improving the modulator resolution, power consumption can be reduced. Mathematical analyses and behavioural simulation results confirm the effectiveness of the new NC method. To examine its performance, a 2nd-order single loop ΣΔ modulator was designed. The new noise-coupling method is used to achieve the three-order noise shaping to increase the resolution with low complexity and low-power. The results show an outstanding improvement in signal-to-noise and distortion ratio (SNDR) compared to the conventional structure.

کلیدواژه‌ها

Single-Loop Σ Δ modulators؛ NTF order؛ noise-coupling (NC)؛ AFF؛ SNDR

سایر فایل های مرتبط با مقاله

vol11-no1-p5.pdf

vol11-no1-p5.pdf