Patent ID: 7652965
Filing Date: 2010-01-26
Classification: G11B

Abstract:
1. An optical information recording apparatus, comprising: a peak level current drive circuit configured to generate a peak level current waveform having a high level; a bias level current drive circuit configured to generate a bias level current waveform having a low level which is lower than the high level; a boost level drive current circuit configured to generate a normal boost level current waveform and a low boost level current waveform which has a lower boost level than a boost level of the normal boost level current waveform, the low boost level being greater than zero; and a drive current circuit configured to drive a laser light source with the high level current waveform superimposed on the low level current waveform in a peak level light emission, the normal boost level current waveform superimposed on the low level current waveform in a normal boost level light emission, and the low boost level current waveform superimposed on the low level current waveform during a peak level sampling operation.