摘要
为提升sigma-delta型ADC的性能、改良调制器模块电路,基于华润上华0.35μm CMOS工艺条件,设计一套适用于高精度sigma-delta型调制器的全差分放大器、量化器以及D触发器电路。全差分放大器应用gain-boost原理和CMFB结构;量化器利用了交叉耦合结构起到再生比较器的作用。使用Cadence软件建立各部分电路结构和对应的仿真电路,在Spectre环境下进行交流、瞬态仿真,并将设计的各部分电路连接起来进行整体仿真。通过分析输出数据功率谱,证明所设计电路满足sigma-delta型ADC性能要求。研究可为高性能sigma-delta型调制器的设计提供参考思路。
In order to improve the performance of sigma-delta ADC and improve the modulator module circuit, a set of fully differential amplifier, quantizer and D flip-flop circuit suitable for high precision sigma-delta modulator is designed based on the 0.35 μm CMOS process conditions of China Resources Shanghua. Gain-boost principle and CMFB structure are applied to the full differential amplifier. The quantizer uses the cross-coupling structure to regenerate the comparator. Cadence is used to establish the circuit structure of each part and the corresponding simulation circuit, and the AC and transient simulation is carried out in Spectre environment, and the designed circuits are connected to carry out the overall simulation. By analyzing the power spectrum of output data, it is proved that the designed circuit meets the performance requirements of sigma-delta ADC. The research can provide reference ideas for the design of high-performance sigma-delta modulator.
作者
杨鸿宇
李新
YANG Hongyu;LI Xin(School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《微处理机》
2022年第5期10-13,共4页
Microprocessors
