Optical source driver with improved input stage

摘要: A driver circuit for a laser diode or other optical source includes an input stage, output and current generator circuit. The is adapted to establish modulation application one of first second the stage in accordance with differential data signal applied stage. pairs. pair has thereto, implemented using MOS devices, substantially unity gain. receives as its inputs corresponding outputs pair, bipolar gain greater than unity. pairs are thus configured such that at rail-to-rail voltage swing will not exceed junction reverse bias constraint pair.