一种用于10位100 MSPS流水线A/D转换器的CMOS线性采样开关  

A CMOS Linear Sampling Switch for 10-Bit 100 MSPS Pipelined A/D Converter

作　　者：唐林[1] 杨谟华[1] 于奇[1] 宁宁[1] 梅丁蕾[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054

出　　处：《微电子学》2005年第2期199-202,共4页Microelectronics

摘　　要：　分析了影响CMOS模拟开关性能的主要因素,针对10位100MHz采样频率A/D转换器对输入信号动态特性的要求,设计了一种适合在3.3V电源电压下工作的CMOS全差分自举开关采样电路。基于0.35μm标准CMOS数模混合工艺,在Cadence环境下采用Hspice对电路进行了模拟。模拟结果显示,其无杂散动态范围达到95dB,满足了A/D转换器采样保持电路对输入信号高动态范围的要求,也保证了电路的可靠性。Major factors affecting the performance of a CMOS analog sampling switch are discussed.And a 3.3 V CMOS differential sampling circuuit based on a bootstrapped analog switch is presented in this paper,which meets the requirements of a 10-bit 100 MHz A/D converter.The entire circuit is simulated by Hspice embedded in Cadence Design software using 0.35 μm standard CMOS AMS process.Results show that a spurious free dynamic range up to 95 dB has been achieved for the circuit,which satisfies the requirement of S/H circuit in A/D converters for large dynamic range,ensuring the reliability of the circuit.

关 键 词：CMOS A/D转换器 模拟开关 自举开关 电荷注入效应 全差分 

分 类 号：TN792[电子电信—电路与系统]