Title :
Light-sensitive CMOS ring oscillator
Author :
Jankovic, N.D. ; Brajovic, V.
Author_Institution :
Robotics Inst., Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
7/20/2000 12:00:00 AM
Abstract :
A simple light-sensitive CMOS ring oscillator, the oscillation frequency of which depends on the chip ambient illumination, is presented. An experimental 21-stage ring oscillator fabricated in 0.5 μm CMOS changes the pulse frequency from 50 Hz in total darkness to 2 MHz in extreme bright ambient at Vdd=1 V
Keywords :
CMOS integrated circuits; feedback oscillators; integrated optoelectronics; photodetectors; photodiodes; 0.5 micron; 1 V; 21-stage ring oscillator; 50 Hz to 2 MHz; chip ambient illumination; inverter circuit; light-sensitive CMOS ring oscillator; oscillation frequency; photo-current; photodiodes; submicron CMOS;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000922
