Patent ID: 6534804
Filing Date: 2003-03-18
Classification: H01L

Abstract:
A semiconductor device comprising:an amplifier which has an input terminal, a feedback input terminal and an output terminal; a first resistor which has a plurality of first connection points to be selectively connected to the input terminal of the amplifier and has both ends to which a voltage is applied; a second resistor which has one end to be connected to the output terminal of the amplifier and has a plurality of second connection points to be selectively connected to the feedback input terminal of the amplifier; and a connection-switching circuit which connects one of the first connection points to the input terminal and one of the second connection points to the feedback input terminal in such a manner that a voltage at the output terminal of the amplifier becomes constant, wherein each of the first and second resistors is formed by connecting a plurality of reference resistors of at least one reference length by means of interconnect lines.