基于环形游标时间数字转换器的编码转换电路  

Encoding and Converting Circuit Based on Vernier Ring Time⁃to⁃digital Converter

作　　者：费宏欣 刘海涛 吴旭鹏 任静 方玉明[1] FEI Hongxin;LIU Haitao;WU Xupeng;REN Jing;FANG Yuming(College of Integrated Circuit Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing,210023,CHN;Nanjing Junxin Technology Co.,Ltd.,Nanjing,210012,CHN)

机构地区：[1]南京邮电大学集成电路科学与工程学院,南京210023 [2]南京筠芯科技有限公司,南京210012

出　　处：《固体电子学研究与进展》2024年第3期234-238,共5页Research & Progress of SSE

基　　金：江苏省研究生科研与实践创新计划项目(SJCX21_0273);国家自然科学基金青年基金项目(11904177,61704090);南京邮电大学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(KFJJ20210205)。

摘　　要：基于应用在锁相环的环形游标时间数字转换器(Vernier ring time-to-digital converter,VRTDC),提出了一种温度计码编码转换电路,解决了VRTDC电路在小量程计数时输出电路无法输出准确的码值,导致时间间隔错误的输出量化问题。采用Cadence Spectre仿真工具在标准180 nm CMOS混合信号工艺下对编码转换电路进行验证,验证结论表明该VRTDC可输出正确的编码值,有效分辨率可达10 ps、动态范围可达560 ns,且在测量范围内具有很好的线性度。Based on the vernier ring time-to-digital converter(VRTDC)applied in phase-locked loops,a thermometer code encoding conversion circuit is proposed,which solves the problem of the VRTDC circuit being unable to output accurate code values during small range counting,resulting in incorrect quantization output time intervals.The encoding conversion circuit was validated using Ca⁃dence Spectre simulation tool under standard 180 nm CMOS mixed signal technology.The validation conclusion shows that the VRTDC can output the correct encoding value,with an effective resolution of 10 ps,a dynamic range of 560 ns,and good linearity within the measurement range.

关 键 词：编码转换电路 时间数字转换器 环形游标 

分 类 号：TN792[电子电信—电路与系统]