一种8位高速折叠内插A/D转换器的设计  

Design of an 8-Bit High Speed Folding and Interpolating A/D Converter

作　　者：陈良[1] 刘琨[1] 张正平[1] 

机构地区：[1]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《微电子学》2012年第3期297-300,共4页Microelectronics

基　　金：国家自然科学基金资助项目(60906009;61176030)

摘　　要：介绍了基于0.35μm BiCMOS工艺的8位高速A/D转换器,采用独特的折叠和内插结构,在大大降低成本、功耗的同时,既能保证超高转换速率,又能达到较高的静态和动态指标。在采样率1GS/s和模拟输入差分250mV(Vp-p)、484MHz条件下进行测试,SFDR高达56dB,SNR高达45.5dB;在3.3V电源电压下,功耗为800mW。An ＆bit high speed A/D converter was designed based on 0. 35/,m BiCMOS process. In the circuit, a unique folding and interpolating structure was adopted to ensure very high conversion speed and good static and dy- namic performance with lower cost and power. Measured results showed that, for 250 mV （Vp-p） analog differential input with an input frequency of 484 MHz, the A/D converter had an SFDR of 56 dB and an SNR of 45.5 dB at 1 GS/s sampling rate. Operating at 3.3 V supply voltage, the circuit dissipated 800 mW of power.

关 键 词：折叠内插结构 A/D转换器 BICMOS工艺 

分 类 号：TN792[电子电信—电路与系统]