The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1998
Filed:
Dec. 19, 1996
Tatsuya Houmoto, Tokyo, JP;
Fumihide Murao, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Engineering Co., Ltd., Tokyo, JP;
Abstract
A signal processing device for optical pick-up includes an information signal silicon photo diode (SPD) group having a plurality of silicon photo diodes. A first electrode of each of the respective silicon photo diodes is connected to a common connection node. A second electrode of each of the respective silicon photo diodes is connected to a corresponding electric potential. An information signal amplifier includes an input node connected to the common connection point and an output node for outputting an information signal. A focus signal SPD group includes a plurality of silicon photo diodes. First electrodes of each of the respective silicon photo diodes of the focus signal SPD group are connected in common and further are connected to the input node of the information signal amplifier.