1-1-1 MASH ∆ Σ Time-to-Digital Converters with 6 ps Resolution and Third-Order Noise-Shaping
1-1-1 MASH ∆ Σ Time-to-Digital Converters with 6 ps Resolution and Third-Order Noise-Shaping
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发表时间：
2012
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通讯作者：
Ying Hui Cao;W. D. Cock;M. Steyaert;P. Leroux
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作者：
Ying Hui Cao;W. D. Cock;M. Steyaert;P. Leroux
本文介绍了两种1-1-1 MASH时间数字转换器（TDC）。三阶时域噪声整形已被TDC采用，以实现优于6 ps的分辨率。在详细分析MASH结构中噪声产生和传播的基础上，采用0.13 μ mCMOS工艺实现了TDC的第一个原型。它实现了11位的有效位数，采用1.2 V电源供电时功耗为1.7 mW。在第二个MASH TDC中，引入了延迟线辅助校准技术，以减轻由大的比较器延迟引起的相位偏移，这是MASH TDC的分辨率的主要限制因素。所演示的TDC实现了13位的有效位和100 ns的宽输入范围。该TDC在-20至120 ° C的温度范围内显示出176 ppm ° C的温度系数。它的功耗仅为0.7 mW，占用0.08 mm的面积（核心）。
Two 1-1-1 MASH ∆Σ 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 ∆Σ structure, the first prototyping TDC has been realized in 0.13 μm 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 mitigate the phase skew caused by the large comparator delay, which is the main limiting factor of the MASH TDC’s resolution. The demonstrated TDC achieves an ENOB of 13 bits and a wide input range of 100 ns. This TDC shows a temperature coefficient of 176 ppm◦C within a temperature range of -20 to 120 ◦C. It consumes only 0.7 mW and occupies 0.08 mm area (core).