Title :
A temperature stabilized CMOS ring oscillator for a time-to-digital converter of a laser radar
Author :
Nissinen, Llkka ; Kostamovaara, Juha
Author_Institution :
Electron. Lab. Linnanmaa, Oulu Univ., Finland
Abstract :
A temperature stabilized CMOS ring oscillator for a time-to-digital converter of a laser radar has been designed. The ring oscillator is based on measuring the frequency of the ring oscillator by a frequency-to-voltage converter and locking that voltage to a stable voltage reference. The simulated temperature stability of the ring oscillator was less than 10 ppm/°C at all different corner points in temperature range of -10°C to 70°C. This corresponds to 0.1 mm/°C in a distance of 10 m. The frequency of the ring oscillator was approximately 653 MHz, giving a resolution of 128 ps.
Keywords :
CMOS analogue integrated circuits; analogue-digital conversion; laser ranging; optical radar; reference circuits; voltage-controlled oscillators; voltage-frequency convertors; -10 to 70 C; 653 MHz; frequency-to-voltage converter; laser radar; pulsed time-of-flight laser range finder; simulated temperature stability; stable voltage reference; temperature stabilized CMOS ring oscillator; time interval measurement unit; time-to-digital converter; voltage controlled differential ring oscillator; voltage locking; voltage-current reference circuit; Frequency conversion; Interpolation; Laser radar; Laser stability; Optical pulses; Ring lasers; Ring oscillators; Temperature; Time measurement; Voltage-controlled oscillators;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE
Print_ISBN :
0-7803-8248-X
DOI :
10.1109/IMTC.2004.1351562
