CAJ | 학술논문

本文报导一种创新的"环状传递延时式"单芯片时间数码转换器,由于线性度优异,测量"预时段"极短,故适用于高重复率光学飞时测距应用,例如扫瞄式三维测量激光雷达.使用一种简单的电路让循环脉冲每一周均回复其脉宽,使可转换的时间长度不会如以往装置因脉冲之前沿与后沿前进速度不同而受到限制.使用市售可编程逻辑单片所制造之原型样机,实验测得之微分误差小于115 psec,非线性度小于0 .31%,而最长可测时间只受限于所用计数器之极限.
본문보도일충창신적"배상전체연시식"단심편시간수마전환기,유우선성도우이,측량"예시단"겁단,고괄용우고중복솔광학비시측거응용,례여소묘식삼유측량격광뢰체.사용일충간단적전로양순배맥충매일주균회복기맥관,사가전환적시간장도불회여이왕장치인맥충지전연여후연전진속도불동이수도한제.사용시수가편정라집단편소제조지원형양궤,실험측득지미분오차소우115 psec,비선성도소우0 .31%,이최장가측시간지수한우소용계수기지겁한.
This paper r eports an innovative single-chip propagation delay ring time-to-digital conve rter with excellent linearity and ultrashort measurement "dead time" suitable for high repetition time-of-flight optical ranging devices such as the scannin g 3-D profiling laser radar.We use a simple pulsewidth-recovering circuit des ign to avoid the range limitation caused by the difference propagation speeds of the rising edge and the falling edge of the circulation pulse.The prototype im plemented on a commercial programmable logic device (PLD) exhibits a differentia l error smaller than 115 psec,nonlinearity less than 0.31%,and the maximum range of the device is only limited by the range of the counter.