| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for adjusting gains improving the accuracy of a detection by a detection means, a gain adjusting circuit and an optical disk device with the gain adjusting circuit in the method for adjusting the gains adjusting the gains of each signal, while feedback-controlling a gain variable means by inputting a plurality of different signals to the gain variable means respectively and inputting an output signal from the grain variable means to one detection means, the gain adjusting circuit and the optical disk device with the gain adjusting circuit. SOLUTION: Output signals are input to nonlinear gain amplifying means for increasing the variations of output gains in a region having the comparatively small levels of the output signals, while reducing the variations of the output gains in the region having the comparatively large levels of the output signals respectively. The output signals from the nonlinear gain amplifying means are input to the detection means. COPYRIGHT: (C)2006,JPO&NCIPI
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