公开(公告)号：DE69202157T2

公开(公告)日：1995-11-02

申请号：DE69202157

申请日：1992-01-07

Applicant: IBM

Inventor： AMANO YOSHIRO ,  HOKOZONO KAZUO ,  SHIMOFUSA TATSUO

IPC: G11B7/125 ,  G11B7/126 ,  H01S5/042 ,  H01S3/096 ,  H01S3/103

Abstract: A laser driver, for an optical disk drive, comprises a source current supply (30), a sink current supply (20), and a switching circuit (40). The switching circuit (40) selectively forms, in response to an input signal, either of a current path through which a constant source current from the source current supply (30) flows into a laser (50) connected to the laser driver and a current path through which at a least a part of the constant source current flows into the sink current supply (20). The driver advantageously permits high-speed switching of the laser.

公开(公告)号：DE69202157D1

公开(公告)日：1995-06-01

申请号：DE69202157

申请日：1992-01-07

Applicant: IBM

Inventor： AMANO YOSHIRO ,  HOKOZONO KAZUO ,  SHIMOFUSA TATSUO

IPC: G11B7/125 ,  G11B7/126 ,  H01S5/042 ,  H01S3/096 ,  H01S3/103

Abstract: A laser driver, for an optical disk drive, comprises a source current supply (30), a sink current supply (20), and a switching circuit (40). The switching circuit (40) selectively forms, in response to an input signal, either of a current path through which a constant source current from the source current supply (30) flows into a laser (50) connected to the laser driver and a current path through which at a least a part of the constant source current flows into the sink current supply (20). The driver advantageously permits high-speed switching of the laser.