湖南大学学报（自然科学版）2016，Vol.43Issue(8)：108-114,7.
一种基于前馈网络的素数Sigma-Delta调制器优化设计
An Optimal Design of Prime Sigma-Delta Modulator Based on Feed Forward
摘要
Abstract
As the key module of fractional-N PLL(Phase Locked Loop),the Sigma-Delta modulator can significantly improve the performance of the fractional-N PLL by the way of noise shaping.However, when it comes to the three most important specifications:the output sequence cycle,the range and the er-ror,the now existing modulators cannot improve them at the same time.As a contrast,the proposed novel Sigma-Delta modulator ameliorates the aforementioned three specifications simultaneously by adding a feed forward between two adjacent stages and adjusting the modulus of adders to prime number.Regardless of the input value and initial conditions,the presented modulator guarantees a sequence length of M3 ,which is almost M2/2 times of that in traditional modulator,where M is the largest prime number smaller than 2n0 ,and n0 is the bit width of adders.The simulation results show that,compared with the existing modu-lators,the proposed modulator can effectively remove the spur in the output spectrum and make it more close to the ideal Sigma-Delta modulator.关键词
Sigma-Delta调制器/量化噪声/功率谱/前馈网络/素数Key words
Sigma-Delta modulator/quantized noise/power spectrum/feed forward/prime number分类
信息技术与安全科学引用本文复制引用
王镇道,阮忠周..一种基于前馈网络的素数Sigma-Delta调制器优化设计[J].湖南大学学报（自然科学版）,2016,43(8):108-114,7.基金项目
湖南省科技计划资助项目 （）
