摘要
介绍了一种基于0.35μm CMOS工艺的4位最大采样速率为1GHz的全并行结构模数转换器的设计.因为在高采样率的情况下,比较器的亚稳态问题降低了模数转换器的无杂散动态范围,在本次设计中对其进行了优化.后仿真结果表明,输入信号为22.949MHz,在1GHz采样率的情况下,信噪比达到25.08dB,积分非线性和微分非线性分别小于0.025LSB和0.01LSB,无杂散动态范围达到32.91dB.芯片采用具有两层多晶硅的0.35μmCMOS工艺设计,总面积为0.84mm2.
A 4bit CMOS analog-to-digital converter with a maximum acquisition speed of 1 GHz is presented.The problem of meta-stability has got special attention in this design,since this problem degrades the Spurious-Free Dynamic Range(SFDR)at high sampling frequencies.Simulated Signal to Noise Ratio(SNR)is 25.08 dB at 1 GHz clock and fin=22.949 MHz.Simulated Integral Nonlinearity(INL)is less than 0.025 Least Significant Bit(LSB),Differential Nonlinearity(DNL)is less than 0.01 LSB and SFDR is 32.91 dB.The chip has be...
出处
《电子器件》
CAS
2007年第2期403-406,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金资助(60576028)
关键词
模数转换器
高速
全并行
亚稳态
CMOS工艺
analog-to-digital converter
high-speed
flash
meta-stability
CMOS process