JSSC 2009第11期Power Management0.35μm CMOSSAR ADCTDC

A CMOS Time-to-Digital Converter TDC Based On a Cyclic Time Domain Successive Ap

本文介绍了一种基于循环时间域逐次逼近法的CMOS时间数字转换器，适用于激光测距等应用。

1.2 ps分辨率, 327 s动态范围, 3.2 ps单次精度, 33 mW功耗, 100 MHz, 3.3 V

时间数字转换器循环时间域逐次逼近法激光测距亚门延迟分辨率积分非线性查找表

▸采用循环时间域逐次逼近法实现1.2 ps分辨率

▸利用数字控制延迟单元负载电容实现亚门延迟分辨率

▸使用外部积分非线性查找表提高单次测量精度

Abstract

This paper describes a time-to-digital converter (TDC) with 1.2 ps resolution and 327 s dynamic range suitable for laser range-ﬁnding application for example. The reso- lution of 1.2 ps is achieved with interpolation based on a cyclic time domain successive approximation (CTDSA) method that resolves the time difference between two non-repetitive signals using binary search. The method utilizes a pair of digital-to-time converters (DTC), the propagation delay difference between which is implem