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:
Nov. 14, 2000
Filed:
Aug. 18, 1998
Takanori Okuda, Kashiba, JP;
Naruichi Yokogawa, Kashihara, JP;
Takayuki Shimizu, Kitakatsuragi-gun, JP;
Fumitaka Nakamura, Yamatotakada, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an amplifier circuit for amplifying the current signal after converting the current signal to a voltage signal. A waveform shaping circuit is included for shaping an output voltage waveform from the amplifier circuit to a substantially square pulse. Finally, an integrator is included for converting the substantially square pulse to a non-square pulse. This is achieved by extending a rising time necessary for shifting the substantially square pulse from a low potential level to a high potential level, and by extending a falling time necessary for shifting the substantially square pulse from the high potential level to the low potential level. As such, deterioration of an S/N ratio is suppressed.