GaN green LED drive device and optical transmission device

摘要

The invention provides a GaN green LED drive device comprising: a bias current output unit for outputting a pulse-like bias current having a low level higher by a predetermined value than a zero level; and a peaking unit for peaking the bias current outputted from the bias current output unit to make rise of the bias current higher than a high level and make fall of the bias current lower than the low level to thereby obtain a peaked bias current supplied to a GaN green LED. The bias current is peaked while the low level of the bias current is set at a higher value (10 mA) than that in the related art. Hence, the fall time t_f becomes 6.6 nsec. The fall time t_f can be shortened greatly compared with that in the related art.