| 摘要 |
PROBLEM TO BE SOLVED: To provide an endoscope apparatus capable of keeping a power supply voltage supplied to a waveform shaping circuit constant by preventing that a difference occurs in a voltage drop amount of a conducting wire for power supply.SOLUTION: An endoscope apparatus 1 has: an insertion part 2 having a CCD 12 in a tip part 11; and a body part 3. The endoscope apparatus 1 has: a waveform shaping circuit 13 provided in the tip part 11 of the insertion part 2, and shaping a waveform of a drive signal to the CCD 12; a stabilization circuit 14 stabilizing a power supply voltage to the waveform shaping circuit 13; a constant current source 22 connected to a power supply line supplying the power supply voltage of the waveform shaping circuit 13; and a transistor 23 and a TG 26 pulling a prescribed current into the constant current source 22 from the power supply line according to an operation state of the waveform shaping circuit 13 such that a potential difference between the power supply voltage of the waveform shaping circuit 13 in non-operation of the waveform shaping circuit 13 and the power supply voltage in operation of the waveform shaping circuit 13 becomes small. |
