JSSC 2012第9期Power ManagementTDC

1-1-1 MASH Time-to-Digital Converters With 6 ps Resolution and Third-Order Noise

本文介绍了两种采用1-1-1 MASH结构的TDC，通过三阶噪声整形实现6 ps分辨率。

ENOB 11-13 bits, 功耗0.7-1.7 mW, 输入范围100 ns

时间数字转换器噪声整形MASH结构高分辨率低功耗

▸创新点1：采用三阶时域噪声整形技术，显著提升时间数字转换器（TDC）的分辨率至6 ps，通过高阶噪声整形有效抑制量化噪声，实现11位ENOB的高精度测量。

▸创新点2：引入延迟线辅助校准技术，有效解决比较器延迟引起的相位偏差问题，提升系统稳定性，使TDC在100 ns宽输入范围内实现13位ENOB的高分辨率。

▸创新点3：结合低功耗设计，在1.2 V电源电压下仅消耗1.7 mW（第一代）和0.7 mW（第二代）的功耗，同时保持高分辨率，适用于对功耗敏感的便携式或嵌入式应用。

▸创新点4：通过CMOS工艺实现原型设计，验证了MASH结构在时间域噪声整形中的可行性，为后续高分辨率TDC的设计提供了可扩展的架构参考。

Abstract

Two 1-1-1 MASH time-to-digital converters (TDCs) are presented in this paper. Third-order time domain noise-shaping has been adopted by the TDCs to achieve better than 6 ps resolution. Following a detailed analysis of the noise generation and propagation in the MASH structure, the ﬁrst prototyping TDC has been realized in CMOS technology. It achieves an ENOB of 11 bits and consumes 1.7 mW from a 1.2 V supply. In the second MASH TDC, a delay-line assisted calibration technique is introduced to mi