| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser driving device capable of effectively solving the problem of unnecessary radiation when a plurality of optical pickups are loaded. SOLUTION: Optical pickups 22 and 23 share a high frequency oscillation circuit 4-1. A high frequency current from the collector C of the transistor Q9 of the high frequency oscillation circuit 4-1 is supplied to an LD driving circuit 9-0. Also, a high frequency current from the emitter E of the transistor Q9 of the high frequency oscillation circuit 4-1 is supplied to the LD driving circuit 9-1. A system controller 10-1 selects the optical pickups 22 and 23 based on enable signals EN-0 and EN-1. |
