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A6 4 64-Pixel CMOS Test Chip for the Development of Large-Format Ultra-High-Spee
一款用于大规模高速成像研究的64像素CMOS测试芯片,具有低偏斜和抖动特性。
曝光时间75 ps至305 ps,偏斜时间小于3 ps,抖动小于1.2 ps rms
CMOS高速成像低偏斜低抖动测试芯片
▸创新点1:H-tree时钟分布与局部和全局中继器的结合使用,显著降低了时钟偏差(skew)至3 ps以下,同时通过优化的中继器设计提高了信号完整性,适用于大规模像素阵列的高速同步控制。
▸创新点2:单边触发传播技术实现了像素间的高度同步曝光,减少了传统双边触发带来的时序不确定性,使得曝光时间可精确控制在75 ps至305 ps范围内,适用于超高速成像应用。
▸创新点3:局部曝光控制电路允许每个像素独立调整曝光参数,结合全局同步机制,在保证低抖动(<1.2 ps rms)的同时提升了系统的灵活性,适用于动态场景的高速捕捉。
▸创新点4:电流导向采样电路(current-steering sampling)通过创新的模拟前端设计,实现了低噪声(115 e- rms)和高动态范围(310,000 e-),为高灵敏度成像提供了硬件支持。
Abstract
A6 4
64-pixel test circuit was designed and fabri-
cated in 0.18-
m CMOS technology for investigating high-speed
imaging with large-format imagers. Several features are integrated
into the circuit architecture to achieve fast exposure times with
low-skew and jitter for simultaneous pixel snapshots. These fea-
tures include an H-tree clock distribution with local and global
repeaters, single-edge trigger propagation, local exposure control,
and current-steering sampling circuits. To evaluate th