Title :
A multi-channel wide range time-to-digital converter with better than 9ps RMS precision for pulsed time-of-flight laser rangefinding
Author :
Jansson, Jussi-Pekka ; Mäntyniemi, Antti ; Kostamovaara, Juha
Author_Institution :
Dept. of Electr. Eng., Univ. of Oulu, Oulu, Finland
Abstract :
A multi-channel time-to-digital converter has been realized in 0.35μm CMOS. The 7-channel converter is based on a multiplying delay-locked loop acting as a first and a capacitor-scaled parallel delay line as a second interpolator, and is able to measure the time intervals and pulse widths or rise times of several successive timing signals. The circuit utilizes a 20MHz external crystal as a time base and offers better than 9ps measurement precision and a measurement range of up to ±74μs.
Keywords :
CMOS integrated circuits; crystals; delay lock loops; laser ranging; time-digital conversion; 7-channel converter; CMOS; RMS precision; capacitor-scaled parallel delay line; external crystal; frequency 20 MHz; multichannel wide range time-to-digital converter; multiplying delay-locked loop; pulsed time-of-flight laser rangefinding; second interpolator; size 0.35 mum; CMOS integrated circuits; Delay; Delay lines; Interpolation; Measurement by laser beam;
Conference_Titel :
ESSCIRC (ESSCIRC), 2012 Proceedings of the
Conference_Location :
Bordeaux
Print_ISBN :
978-1-4673-2212-6
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2012.6341338
