南京邮电大学学报（自然科学版）2024，Vol.44Issue(3)：42-47,6.DOI:10.14132/j.cnki.1673-5439.2024.03.006
基于 0.18 μm SiGe BiCMOS工艺的4GS/s、14 bit数模转换器
A 4 GS/s,14-bit DAC based on 0.18 μm SiGe BiCMOS technology
摘要
Abstract
This paper presents a design of 4GS/s,14-bit ultra high-speed and high resolution digital-to-analog converter(DAC)based on the 0.18 μm SiGe BiCMOS technology.To achieve the 4 GHz processing speed,all circuits in the DAC are built with heterojunction bipolar transistors(HBTs).To reduce power consumption and save area,this design adopts a 10+4 segmented decoding method.The low 10 bits take an R-2R trapezoidal resistance network,while the high 4 bits adopt a thermometer code current steering structure.Post simulation results demonstrate that the differential nonlinearity(DNL)and integral nonlinearity(INL)of the DAC are 0.54 LSB and 0.39 LSB,respectively.The spurious-free dynamic range(SFDR)is better than 82 dBc in the whole Nquist band for sampling rate of 4 GS/s.The DAC consumes 2.39 W under supply voltages of 3.3 V and 5 V.The size of the chip is 11.22 mm2.关键词
数模转换器/SiGe HBT/电流模逻辑/电流舵Key words
digital-to-analog converter(DAC)/SiGe heterojunction bipolar transistor(HBT)/current mode logic/current steering分类
信息技术与安全科学引用本文复制引用
张翼,戚骞,张有涛,韩春林,王洋,张长春,郭宇锋..基于 0.18 μm SiGe BiCMOS工艺的4GS/s、14 bit数模转换器[J].南京邮电大学学报（自然科学版）,2024,44(3):42-47,6.基金项目
国家自然科学基金(61804081)、微波毫米波单片集成和模块电路重点实验室基金重点项目(614280304012101)、东南大学毫米波国家重点实验室开放课题(K202220)、射频集成与微组装技术国家地方联合工程实验室开放课题(KFJJ20210206)、南京邮电大学科学研究基金(NY221065)和国家留学基金(CSC202108320189)资助项目 （61804081）
