TWO-LEVEL SEMICONDUCTOR LASER DRIVER

摘要

Disclosed is a two-level current driver (200) suitable for driving a semiconductor laser (250) for printing applications, the laser driver (200) comprising a primary power source (210, 212) for producing a first current pulse (161) of amplitude I1 and of duration T2, a secondary power source (220, 222) for producing a second current pulse (162) of amplitude I2 and of duration T1, means for combining the outputs of the power sources, and sensing means (260) for detecting the current pulse output from the primary power source (210, 212).