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JSSC 2020第11期Power Management0.35µm CMOS

Large-Area Fast-Gated Digital SiPM With Integrated TDC for Portable and Wearable

设计了一种大面积快速门控数字SiPM,集成TDC,适用于便携式和可穿戴设备
8.6mm²感光面积,37%填充因子,300ps上升沿,78ps TDC LSB,128时间bin,>100dB动态范围
数字SiPM时间门控TDC近红外光谱可穿戴设备
创新点1:大面积快速门控数字SiPM(电路创新):采用8.6 mm²大面积光敏区域和37%填充因子,结合低噪声单光子雪崩二极管(SPAD),实现了高灵敏度和快速响应(300 ps上升沿),适用于便携式和可穿戴设备。
创新点2:集成TDC和直方图构建电路(系统创新):内置时间数字转换器(TDC)和直方图构建电路,具有78 ps的最小分辨率(LSB)和128个时间通道,显著提升了时间域近红外光谱(TD-NIRS)测量的精度和效率。
创新点3:低功耗差分传感技术(方法创新):采用新型低功耗差分传感技术,优化了面积占用和功耗,同时保持了高灵敏度和动态范围(>100 dB),适用于资源受限的便携式系统。
创新点4:可编程有源区域尺寸(电路创新):通过可编程有源区域尺寸设计,实现了动态范围的灵活调整,进一步增强了系统在不同应用场景下的适应性和性能表现。
Abstract
We present the design and characterization of a large-area, fast-gated, all-digital single-photon detector with programmable active area, internal gate generator, and time-to- digital converter (TDC) with a built-in histogram builder circuit, suitable for performing high-sensitivity time-domain near- infrared spectroscopy (TD-NIRS) measurements when coupled with pulsed laser sources. We used a novel low-power differential sensing technique that optimizes area occupation. The photode- tector is a