Offset adjusting circuit for optical disc and offset...

Details Offset adjusting circuit for optical disc and offset... Offset adjusting circuit for optical disc and offset...

2007-08-14

2007-08-14

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S047250, C369S053320

Reexamination Certificate

active

10850789

ABSTRACT:
An offset adjusting circuit for an optical disc comprises an offset-adjustment differential operational amplifier having an input terminal to which an output signal of an optical pickup is input and the other input terminal to which a control voltage is applied, an A/D converter that outputs a digital signal based on an output signal of the offset-adjustment differential operational amplifier, and a control voltage adjuster that varies the control voltage applied to the offset-adjustment differential operational amplifier based on the digital signal so as to remove an offset.

REFERENCES:
patent: 6992954 (2006-01-01), Tsai et al.
patent: RE39306 (2006-09-01), Konishi et al.
patent: 10-105997 (1998-04-01), None

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