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. 31, 2010
Filed:
Jun. 02, 2006
Hiroshi Suzunaga, Kanagawa-ken, JP;
Hiroshi Suzunaga, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An optical signal receiving circuit, may include a first transimpedance amplifier configured to convert a first current signal into a first voltage signal, wherein the first current signal generated in a first photodiode, to which an optical signal is inputted; a second transimpedance amplifier configured to convert a second current signal into a second voltage signal, wherein the second current signal generated in a second photodiode, to which an optical signal is inputted; a noise detection circuit configured to detect a noise signal of the second voltage signal, and configured to shift at least one of the first voltage and the second voltage in order to widen a voltage difference between the first voltage signal and the second voltage signal when the noise signal of the second voltage signal is detected; and a first comparator having as inputs the first voltage signal and the second voltage signal, and configured to generate a digital signal based on the first voltage signal and the second voltage signal.