Light-receiving device, optical pickup, and optical disc...

Details Light-receiving device, optical pickup, and optical disc... Light-receiving device, optical pickup, and optical disc...

2008-01-15

2008-01-15

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140AG, C250S2140LS, C250S201500, C369S124120

Reexamination Certificate

active

07319221

ABSTRACT:
A signal-detecting light-receiving device formed as an integrated circuit, which receives a light beam reflected from an optical recording medium, and which outputs a signal obtained from the received reflected light beam, through a current-output-type current amplifier circuit. The light-receiving device includes the following components: at least one resistor configured as a part of the integrated circuit, the at least one resistor being an output resistor used as a termination resistor for an output terminal of the light-receiving device, the output terminal being connected to an output of the current amplifier circuit; and a selecting circuit configured as a part of the integrated circuit, which controls the at least one resistor so as to enable/disable connection of the at least one resistor to the output terminal of the light-receiving device.

REFERENCES:
patent: 5936231 (1999-08-01), Michiyama et al.
patent: 2006/0170504 (2006-08-01), Kim et al.

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