Abstract: A semiconductor device comprises: a first resistor which has a plurality of first connection points to be selectively connected to an input terminal of an amplifier and has both ends to which a voltage is applied; and a second resistor which has one end to be connected to an output terminal of the amplifier and has a plurality of second connection points to be selectively connected to a feedback input terminal of the amplifier. One of the first connection points and one of the second connection points are selected in such a manner that a voltage at the output terminal of the amplifier becomes constant. Each of the first and second resistors is formed of first reference resistors having a first reference length and second reference resistors having a second reference length as many as needed, both of which are connected by an interconnect layer. The first and second reference resistors for forming the first and second resistors are provided in an effective resistor region and are regularly arranged.