CMOS Radiation Detector Using Arrayed Correlation

在这项工作中，我们研究了一种基于芯片的辐射探测器。作为塑料闪烁体的PET产生紫外光，光由单光子雪崩二极管(SPAD)在芯片上实现探测。偏置电压的产生对提高SPAD的灵敏度非常重要。SPAD阵列是自校准的，以排除缺陷元件并具有高偏置电压。还需要时钟产生来测量暗计数，并将其用于校准。用标准单元实现了低功耗、高精度的片上时钟产生器。

In this work, a radiation detector using a CMOS chip has been studied. PET as a plastic scintillator generates ultraviolet light, and the light is detected by single-photon avalanche diode (SPAD) implemented on a CMOS chip. A bias voltage generation is very important to improve SPAD sensitivity. A SPAD array is self-calibrated for excluding defect-elements and having high bias voltage. A clock generation is also required to measure a dark count, and it is used for the calibration. A low-power and accurate on-chip clock generator is realized by using only standard cells.