Bioelectric potential measuring device, electrostatic capacity control device, electroencephalography, electrostatic capacity control method and program
The bioelectrical potential measuring apparatus (1b) is a bioelectrical potential measuring apparatus for measuring a living potential of a user (10).The bioelectric potential measuring device (1b) isA measurement electrode (48) contacting the user (10) andDifferential amplification of the bioelectric potential detected by the reference electrodeA bio potential amplifier (14) which performs a / D conversion andA bio potential output part (15) which outputs a digital signal made bioelectrical potential andA power supply section (220) for supplying power to at least one of a bioelectric potential amplification section (14) and a biopotential output section (15)；An electrostatic capacity (201) having a capacitance electrode to which the wiring covering the circumference of the measuring electrode (48) as the shielding member (200) is connected.The ground potential of the power supply portion 220 is electrically connected to the ground potential of the capacitance 201.生体電位測定装置（１ｂ）は、ユーザ（１０）の生体電位を測定するための生体電位測定装置である。生体電位測定装置（１ｂ）は、ユーザ（１０）に接触する測定電極（４８）と、参照電極（４９）で検出された生体電位を差動増幅し、Ａ／Ｄ変換を行う生体電位増幅部（１４）と、デジタル信号化された生体電位を出力する生体電位出力部（１５）と、生体電位増幅部（１４）及び生体電位出力部（１５）の少なくとも一方に電力を供給する電源部（２２０）と、測定電極（４８）の周囲をシールド部材（２００）として覆う配線が接続される容量電極を有する静電容量（２０１）とを備える。電源部（２２０）の接地電位は、静電容量（２０１）の接地電位と電気的に接続される。
