Keywords: Vactrol distortion graph.png en Typical pattern of amplitude distortion of a LED-LDR optoisolator vactrol as a function of RMS AC voltage across the LDR photoresistor In the absence of DC bias most of distortion is third harmonic with some second harmonic At very low voltages distortion levels at a residual floor and is somewhat counteintuitively almost all second harmonic Adapted from charts and textual data in PerkinElmer 2001 http //www datasheetcatalog org/datasheet/perkinelmer/VT500 pdf Photoconductive Cells and Analog Optoisolators Vactrols® pp 35-36 own East of Borschov 2010-11 Vactrol |