Optical pickup device, information reproduction/recording...

Details Optical pickup device, information reproduction/recording... Optical pickup device, information reproduction/recording...

2006-03-21

2006-03-21

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044410, C369S124120

Reexamination Certificate

active

07016273

ABSTRACT:
The present invention provides an optical pickup device that is resistant to noise in a signal or an RF signal outputted from each light receiving member. Current signals outputted from the light receiving members are converted into voltage signals by I/V converters. The voltage signals are then added up by an adder, and then the added voltage signal is attenuated by an attenuator, so as to obtain an RF signal having the same signal level as the voltage signal outputted from each I/V converter. The RF signal is then transmitted from the optical pickup device to a circuit substrate through a signal line.

REFERENCES:
patent: 6154426 (2000-11-01), Kadowaki
patent: 6222804 (2001-04-01), Yoshizawa
patent: 6282158 (2001-08-01), Kuroiwa
patent: 05-174387 (1993-07-01), None
patent: 06-333291 (1994-12-01), None
patent: 07-037329 (1995-02-01), None
patent: 11-162003 (1999-06-01), None
patent: 11-306680 (1999-11-01), None

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