A medical device according to the present invention is a circuit that is electrically insulated from each other and includes one circuit having a first reference potential and a second reference potential different from the first reference potential The attenuation unit being provided on one side of the circuit and attenuating the amplitude of the received signal and the attenuation unit which attenuates the amplitude of the received signal while maintaining the insulation between the one circuit and the other circuit , And a pulse transformer for transmitting a signal attenuated by the attenuation unit from one circuit to the other circuit.本発明にかかる医療機器は、互いに電気的に絶縁されている二つの回路であって、第一の基準電位を有する一方の回路と、前記第一の基準電位とは異なる第二の基準電位を有する他方の回路との間の信号伝送を行う医療機器であって、一方の回路側に設けられ、受信した信号の振幅を減衰させる減衰部と、一方および他方の回路間の絶縁を維持しつつ、減衰部によって減衰された信号を一方の回路から他方の回路に伝送するパルストランスと、を備えた。
