Signal level switching circuit

摘要

A signal level switching circuit is provided with input resistors 2 a and 2 b connected between input terminals 1 a and 1 b of a signal and output terminals 5 a and 5 b used to be connected to a reception circuit 6 ; a switch circuit 3 which has been constituted by a plurality of switching elements and has been connected to the output terminals 5 a and 5 b; and a voltage dividing resistor 4 for selectively switching/connecting with respect to the input resistors 2 a and 2 b by this switch circuit 3.