> This Philips datasheet shows the forward recovery > characteristic in terms of overshoot voltage Vfr: > http://ronja.twibright.com/datasheets/1N4148_1N4448_5.pdf Yes, that is something I can recognise as a switch-on parameter :) Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist