PROBLEM TO BE SOLVED: To improve electromagnetic non-interference and resistance of an electronic endoscope apparatus.SOLUTION: An electronic endoscope apparatus includes: an electronic scope that is provided with a distal end board mounted with an imaging device inside a distal end part of an insertion part and a driver board which is mounted with a drive circuit performing drive control of the imaging device. The electronic scope is inserted in the insertion part and is provided with a plurality of coaxial cables connecting the driver board and the distal end board respectively. The ground lines of the distal end board and the driver board are connected by external conductors of the plurality of coaxial cables, and the driver board is mounted with a ground bounce reduction circuit stabilizing potential of the ground lines of the driver board.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】電子内視鏡装置の電磁的な不干渉性および耐性を向上させる。【解決手段】電子内視鏡装置は、撮像素子が実装された先端基板を挿入部の先端部内に備えた電子スコープと、撮像素子を駆動制御する駆動回路が実装されたドライバ基板と、を備える。電子スコープが、挿入部内を通され、ドライバ基板と先端基板とをそれぞれ接続する複数の同軸ケーブルを備える。先端基板とドライバ基板のグランドライン同士が、複数の同軸ケーブルの外部導体によりそれぞれ接続され、ドライバ基板には、ドライバ基板のグランドラインの電位を安定化させるグランドバウンス低減回路が実装される。【選択図】図3
