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:
Jul. 02, 2013
Filed:
Jan. 08, 2011
Shougo Matsuda, Tachikawa, JP;
Hiroyuki Yoshioka, Akishima, JP;
Ryuichi Satomura, Tsurugashima, JP;
Hideyuki Takahashi, Hachioji, JP;
Akihiko Goto, Ome, JP;
Shougo Matsuda, Tachikawa, JP;
Hiroyuki Yoshioka, Akishima, JP;
Ryuichi Satomura, Tsurugashima, JP;
Hideyuki Takahashi, Hachioji, JP;
Akihiko Goto, Ome, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical receiver circuit is configured as follows: a preamplifier and a reference voltage generating circuit are connected with a first ground potential wiring and a first power supply wiring, which are used in common, and are formed in a first region where elements are formed on a substrate to which the potential of the first ground potential wiring is supplied; a main amplifier is connected with a second ground potential wiring and a second power supply wiring, which are separated from the first ground potential wiring and the first power supply wiring, and is formed in a second region where elements are formed on the substrate to which the potential of the second ground potential wiring is supplied; and a substrate supply interval where a first substrate supply position at which the potential of the first ground potential wiring is supplied and a second substrate supply position at which the potential of the second ground potential wiring is supplied are closest to each other is large to an extent where a substrate permeability characteristic, in which noise is fully attenuated in an alternating current (AC) manner, is obtained.