PROBLEM TO BE SOLVED: To provide an endoscopic device capable of making power consumption low after being equipped with an energy limiting circuit and performing highly accurate current constant control.SOLUTION: A current is supplied from a voltage controlled current source 31 disposed in a safety area Ds against a load 34 disposed in a dangerous area Dd via an energy limiting circuit 33 including a current limiting resistance 33b disposed in the middle of a signal line 32, voltages at both ends of the current limiting resistance 33b which also functions as a detection resistance are detected by a controlled voltage generating circuit 43 via detecting signal lines 35a and 35b, the detected voltage is applied to a base of a transistor 42 as a controlled voltage, and the current flowing through between collector emitters of the transistor 42 is controlled so as to become a constant current.COPYRIGHT: (C)2013,JPO&INPIT【課題】エネルギ制限回路を備えた上で、低消費電力にできると共に、高精度の定電流制御ができる内視鏡装置を提供する。【解決手段】危険領域Ddに配置される負荷34に対して安全領域Ds内に配置された電圧制御電流源31から信号線32の途中に配置された電流制限抵抗33bを含むエネルギ制限回路33を介して電流を供給し、検出抵抗の機能を兼ねる電流制限抵抗33bの両端の電圧を検出用信号線35a、35bを介して制御電圧生成回路43は検出し、検出した電圧を制御電圧としてトランジスタ42のベースに印加し、トランジスタ42のコレクターエミッタ間を流れる電流が定電流となるように制御する。【選択図】図3
