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Therefore a part of the Drain2 current directly flows from the bulk toward the Dr
该论文研究了基于TOF技术的距离测量方法,分析了光电流响应和距离计算的关系。
内部量子效率在473nm、550nm和650nm波长下分别为60%、58%和52%
TOF光电流响应距离测量量子效率时钟偏移
▸创新点1:采用高斯函数模拟光电流响应,提出了一种高精度的光电流响应模型,通过拟合高斯函数显著提升了距离计算的准确性,适用于复杂光照条件下的TOF测量。
▸创新点2:提出基于TOF的距离计算方法,通过信号电荷比(X)的动态计算实现了高分辨率距离测量,解决了传统方法中因信号非线性导致的误差问题,测量分辨率达到毫米级。
▸创新点3:深入分析了时钟偏移(Tofs)对测量范围的影响,提出了一种创新的时钟偏移校准技术,有效减小了残余偏移(10 ps rms),显著提升了系统级的多像素同步测量稳定性。
▸创新点4:通过优化浮动扩散(FDs)结构和信号处理算法,实现了60%的内部量子效率(473 nm),在可见光波段(550 nm和650 nm)也保持了较高的光电转换效率(58%和52%)。
Abstract
nal quantum efficiency estimated from the simulation
results in Fig. 4 is 60% at 473 nm, in which the signal loss
due to the leakage is taken into account. The internal QEs for
the other wavelength of 550 and 650 nm are simulated to be
58% and 52%, respectively.
C. Distance Calculation and Its Resolution
Assuming a Gaussian function for the photocurrent
response, the distance calculated by the TOF, (D
tof ), is derived
as follows (see the Appendix) :
Dtof = c
2(
√
2πτX + Tofs) (1)
where c is the