摘要
基于全差分开关电流存储单元,设计了一种二阶开关电流Σ-Δ调制器。采用标准0.18μm数字CMOS工艺,在spectre仿真器下进行优化仿真。实验表明,调制器在1.8 V工作电压、5 MHz采样频率、125倍过采样率下,输出波形与Matlab下的行为仿真波形接近,具备调制功能并达到12 bit分辨率。与类似研究相比,本设计在相当的分辨率条件下,实现了低电压工作。
Based on fully differential switched current memory cell, the paper designed a second-order ∑-△ switching current modulator. Using standard 0.18 μm digital CMOS process, under the spectre simulator to optimize and simulate. Experiments show that when the modulator operating at 1.8 V, 5 MHz sampling frequency, 125 times over-sampling rate, The output waveforms similar with Matlab behavior simulation waveforms, with modulation and achieved 12 bit resolution. Compared with similar studies, this design achieved low voltage operation.
出处
《电子技术应用》
北大核心
2012年第2期34-36,39,共4页
Application of Electronic Technique
