%A Ruitong ZHENG, Guanhao WU %T Constant fraction discriminator in pulsed time-of-flight laser rangefinding %0 Journal Article %D 2012 %J Front. Optoelectron. %J Frontiers of Optoelectronics %@ 2095-2759 %R 10.1007/s12200-012-0229-2 %P 182-186 %V 5 %N 2 %U {https://journal.hep.com.cn/foe/EN/10.1007/s12200-012-0229-2 %8 2012-06-05 %X

Constant fraction discriminator (CFD) is one of theoretic method which can locate timing point at same fraction of echo pulse in pulsed time-of-flight (TOF) laser rangefinding. In this paper, the theory of CFD method was analyzed in reality condition. The design, simulation and printed-circuit-board (PCB) performance of CFD circuit were shown. Finally, an over amplified method was introduced, by which the influence of direct-current (DC) bias error could be reduced. The experimental results showed that timing discriminator could set the timing point to a certain point on echo pulse, which did not depend on the amplitude of echo pulse.