Frontiers of Optoelectronics, Volume. 5, Issue 2, 182(2012)
Constant fraction discriminator in pulsed time-of-flight laser rangefinding
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.
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Ruitong ZHENG, Guanhao WU. Constant fraction discriminator in pulsed time-of-flight laser rangefinding[J]. Frontiers of Optoelectronics, 2012, 5(2): 182
Received: Nov. 13, 2011
Accepted: Jan. 12, 2012
Published Online: Feb. 23, 2013
The Author Email: ZHENG Ruitong (zrt08@mails.tsinghua.edu.cn)