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:
Oct. 01, 2002
Filed:
Sep. 30, 1999
Fujio Okada, Saitama-ken, JP;
Mitsuhisa Nakagawa, Kanagawa-ken, JP;
Keiichi Negishi, Kanagawa-ken, JP;
Fuji Photo Optical Co., Ltd., Ohmiya, JP;
Abstract
With an electronic endoscope, a wide band video signal is output to connected instruments without giving electric shocks to a body even when the connected instruments are not insulated. The video signal V is converted to differential signals V , V by a differential amp and input to buffers via capacitors . The clamp signal CP generated by the clamp signal output means is input to the end terminals of the switches SW , SW via the photocoupler . The differential signals V , V undergo pulse clamping in the buffers and the DC components are restored. The video signal restoring portion restores the video signal V on the basis of the differential signals V , V having undergone DC restoration and outputs the video signals to the connected instruments.