| 摘要 |
PROBLEM TO BE SOLVED: To provide an integrated circuit for photodiodes adaptive to a plurality of kinds of optical disks for which photodiodes different from each other need to be used, the circuit having reduced circuit scale. SOLUTION: The integrated circuit for photodiodes includes the plurality of photodiodes A and (a) receiving laser beams, an amplifier circuit 1 which amplifies output signals of the respective photodiodes A and (a), and a switch 41 which changes connections between the respective photodiodes A and (a) and the amplifier circuit 1. Consequently, the integrated circuit for the photodiodes can be provided which is adaptive to a plurality of kinds of optical disks for which photodiodes A and (a) different from each other need to be used, the circuit having reduced circuit scale. COPYRIGHT: (C)2009,JPO&INPIT
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