OPTICAL TRANSMITTER CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an optical transmitter circuit improving start-up characteristics of a laser output of a high power level for a high speed communication. SOLUTION: A light emitting device driving differential switch 2 includes first and second transistors M1 and M2. A third transistor M3 is connected as an auxiliary switch in parallel to the first transistor M1 whose drain is connected to a light emitting device 1. A third switch driving signal IN3 is input to the third transistor M3 to turn ON the third transistor M3 at a slightly earlier point in time than when complementary switch driving signals IN1 and IN2 are input to drive the first and second transistors M1 and M2. COPYRIGHT: (C)2009,JPO&INPIT