一种新型的开关电容阵列结构  

A New Kind of Switched Capacitor Array

作　　者：景琦[1] 陈志良[1] 

机构地区：[1]清华大学微电子学研究所,北京100084

出　　处：《电子学报》1998年第11期20-24,共5页Acta Electronica Sinica

摘　　要：作者针对开关电容阵列（SwitchedCapacitorArray，简称SCA）在高能物理实验中的应用进行了细致的研究提出了一种新型开关电容阵列结构，有效地改善时钟馈漏对存储精度的影响和读出运放的失调对读出精度的影响，并且专门设计了一种能够实现“轨到轨”应用的读出运放在电路设计和模拟的基础上，采用1．2μmN阱双层金属双层多晶CMOS工艺进行了该数模混合电路试验样片的全定制版图设计，并进行了工艺流水测试结果表明，作者所设计的SCA芯片成功地实现了所设想的功能，最高采样率为180MHz，采样率6MHz时的直流增益为0．99，非线性度为0．02％The research work is focused on the specific application of switched capacitor array(SCA) in high energy physics experiments. A new kind of an is proud, which can effectively overcome the influence of clock feedthrough on sample precision and offset voltage of read-out amplifier on read-out precision. An amplifier which can meet the requirement of rail-to-rail application is specially designed. On the basis of circuit simulation, full-custom layout of this mixed-signal circuit is designed, according to the deSign rule of 1. 2μm N-well double-metal double-poly CMOS technology. The test results of the sample dice show that the dice fulfills the function expected successfully, with maximum sampling rate 180MHz, co gain(sampling rate: 6MHz) 0. 99, and nonlinearity 0. 02 %.

关 键 词：开关电容阵列 轨到轨 IC 时钟馈漏 数据采集系统 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置] TN450.3[自动化与计算机技术—控制科学与工程]