| 一种12位开关电流型Σ-△调制器 |
| |
| 引用本文： | 许刚,沈延钊.一种12位开关电流型Σ-△调制器[J].微电子学,2000,30(4):234-237. |
| |
| 作者姓名： | 许刚 沈延钊 |
| |
| 作者单位： | 清华大学,微电子学研究所,北京,100084 |
| |
| 摘 要： | 开关电流电路（ＳＩ）是近年兴起的一种模拟电路。文中引用了新型的两步采样开关电流技术（Ｓ＾２Ｉ），对该电路中减小时钟馈漏效应的几种方法进行了分析。利用差分平衡结构的Ｓ＾２Ｉ存储单元设计了平衡Ｓ＾２Ｉ积分器，并在此基础上设计出一种平衡差分结构的二阶∑－△调制器。该调制器能够完全与标准ＣＭＯＳ数字工艺兼容。利用标准１．２μｍ数字ＣＯＭＳ工艺的ＨＳＰＩＣＥ模型参数进行了分析，该电路信噪比达到７３．３ｄＢ，
|
| 关 键 词： | CMOS 开关电流电路 填量调制器 |
| 文章编号： | 1004-3365(2000)-04-0234-04 |
| 修稿时间： | 1999-11-03 |
A 12-Bit Switched-Current Sigma-Delta Modulator |
| |
| XU Gang,SHEN Yan-zhao.A 12-Bit Switched-Current Sigma-Delta Modulator[J].Microelectronics,2000,30(4):234-237. |
| |
| Authors: | XU Gang SHEN Yan-zhao |
| |
| Abstract: | A novel two step sampling SI circuit(S2I)is presented. Techniques to minimize the clock feed-through effects are analyzed. A balanced S2I integrator is designed in favor of this circuit. Then,a differential balanced second-order modulator is devised based on the integrator. Fabrication process for the modulator is absolutely compatible with the standard CMOS digital technology. Analysis of the SPICE simulation shows that the modulator has achieved a signal-to-noise ratio of 73. 3 dB and an accuracy of 12 bit. |
| |
| Keywords: | Analog circuit Switched current circuit S2I modulato( |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
