Keywords: Idealized vactrol transfer function 2.PNG en Idealized transfer function of a LED-LDR optoisolator vactrol Green band approximated fluctuations due to memory effect at room temperature Wider red band approximates effects of thermal drift changes in optical coupling due to thermal shifts in LED emission band etc As a general rule all irregularities decrease with the increase in illuminance Adapted from drawings in PerkinElmer 2001 http //www datasheetcatalog org/datasheet/perkinelmer/VT500 pdf Photoconductive Cells and Analog Optoisolators Vactrols® pp 34 response curve 10 12 thermal drift and idealized model in Silonex 2007 http //www silonex com/audiohm/constants html Audiohm Optocouplers Audio Characteritics own East of Borschov 2010-11 Vactrol |