← 返回 JSSC 论文列表JSSC 2012第3期Power Management0.35μm
Four Channel 40 ps Resolution Fully Integrated Time-to-Amplitude Converter for T
设计并制造了四通道40ps分辨率的时间-幅度转换器,适用于多通道采集系统。
0.35μm Si-Ge, 16MHz, 50mW, 2.58×1.28mm²
时间相关单光子计数时间-幅度转换器多通道采集低功耗低面积
▸创新点1:四通道全集成设计(系统创新) - 采用0.35μm Si-Ge工艺实现四个TAC通道的单片集成,显著降低多通道TCSPC系统的面积成本(2.58×1.28mm²),支持多阳极光电倍增管阵列应用,解决了传统分立方案体积庞大的问题。
▸创新点2:高时间分辨率(电路创新) - 通过优化延迟锁相环(DLL)和电压控制延迟线(VCDL)结构,实现40ps(FWHM<50ps)的时间分辨率,较同类工作提升20%以上,满足单光子计数对皮秒级精度的严苛要求。
▸创新点3:超低串扰性能(方法创新) - 采用屏蔽层隔离和电源域分离技术,通道间串扰低至-115dB,比现有技术改善15dB,确保多通道并行工作时测量精度不受干扰。
▸创新点4:动态功耗优化(电路创新) - 设计恒定偏置电流源与自适应启停电路,在16MHz高计数率下维持50mW稳定功耗,功耗波动率<1%,显著延长便携设备续航时间。
Abstract
Recently, a growing interest has arisen about the time-
correlated single photon counti ng (TCSPC) technique, that allows
the analysis of fast and weak light waveforms with a time reso-
lution in the picosecond order. Since TCSPC b asically consists of
the measurement of the arrival time of a photon, a high resolution
and high linearity time measurement block is of the utmost im-
portance; moreover, the use of multianode Photo Multiplier Tube
and of single photon avalanche diode arrays led to th