基于环形振荡器的时间数字转换器前期研究进展

Prophase Research Progress of Time-to-Digital Converters Based on Ring Oscillator

随着CMOS工艺的不断发展,时间数字转换器(TDC)的性能不断提升,被广泛应用于医学成像、激光测距、全数字锁相环等领域。基于环形振荡器的时间数字转换器(RO-TDC)具有动态范围大和分辨率高的优点,已成为目前研究热点。介绍了RO-TDC的工作原理,综述了RO-TDC的结构类型和发展现状,总结了RO-TDC的发展趋势。

With the development of CMOS process,the performance of time-to-digital converters（TDC）had been continuously improved.They were widely used in biomedical imaging,laser ranging,all-digital phase-locked loops and other fields.The ring oscillator based time-to-digital converters（RO-TDC）became the focus of current researches because of the advantages of wide dynamic range and high resolution.Firstly,the operational principle of RO-TDCs was introduced,and then the structure types and current status of development of the RO-TDCs were discussed.Finally,the development trend of RO-TDCs was concluded.