An input circuit includes a first differential amplification circuit receiving input from a first power source and an output of a first buffer circuit to output to an input of the first buffer circuit, a second differential amplification circuit receiving input from a second external power source and an output of a second buffer circuit to output to an input of the second buffer circuit, a first resistance coupled between the output of the first differential amplification circuit and the input of the first buffer circuit, and a second resistance coupled between the output of the second differential amplification circuit and the input of the first buffer circuit. The first resistance and the second resistance are arranged at symmetric positions to a node on a signal line from the input signal terminal to the output signal terminal.