CURRENT DRIVE CIRCUIT AND OPTICAL STORAGE SYSTEM INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide means capable of stably driving output current regardless of a change in the magnitude of input current.

SOLUTION: The present invention relates to a current drive circuit and an optical storage system including it, and the current drive circuit based on the invention includes: a first transistor to which input current is caused to flow; a second transistor for mirroring the input current to generate output current; a plurality of switches connected in parallel between the first transistor and the second transistor to selectively and electrically connecting the first transistor and the second transistor in response to a control signal; a plurality of channel circuits including a control part for selectively activating the control signal respectively corresponding to the switches on the basis of the magnitude of the input current; and an adder for adding the output current of the channel circuits to generate drive current. The current drive circuit can prevent delay of the drive current to stably supply the drive current.

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