| 摘要 |
PROBLEM TO BE SOLVED: To generate a multiple value LD drive signal for PAM, high speed, with low power consumption, with a simple circuit configuration.SOLUTION: The DML driver includes a current sink circuit DRprovided for each bit k (k=0, 1, ..., n-1) of a digital input signal D. The current sink circuit DRcontrols sinking of a set current value Ipreset against the bit k from a constant current Isupplied to an LD in accordance with a bit value Dof the bid k.SELECTED DRAWING: Figure 2 |
