Title :
An Integrating Digital Light Meter
Author :
Murphy, H.E. ; Kabell, L.J.
Abstract :
A description is given of a novel light-to-frequency converter circuit which makes possible a very simple digital light meter using conventional frequency counting techniques. This circuit combines the principle of time-integration, the high stability of reverse biased silicon planar photodiodes, and first order dark current compensation to yield a potentially 0.1 percent accuracy light meter. Some discussion of temperature effects upon planar diode photocurrent is given.
Keywords :
Converters; Digital integrated circuits; Photodiodes; Circuits; Dark current; Frequency conversion; Lighting; Photoconductivity; Photodiodes; Semiconductor diodes; Silicon; Surface waves; Temperature sensors;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1966.1049748
