Patent ID: 8384469

Claim:
A voltage divider circuit, comprising: a first resistor circuit comprising a first resistor group including: a plurality of resistors connected in series; and selection circuits connected in parallel to the plurality of resistors, respectively, the first resistor group being formed so that the plurality of resistors each have a resistance weighted according to a binary code; a second resistor circuit comprising a second resistor group including: a plurality of resistors connected in series; and selection circuits connected in parallel to the plurality of resistors, respectively, the second resistor group being formed so that the plurality of resistors each have a resistance weighted according to the binary code; and a third resistor circuit connected in series between the first resistor circuit and the second resistor circuit, for outputting a divided voltage from an output terminal, wherein the selection circuits of the first resistor circuit and the selection circuits of the second resistor circuit are selected so that a combined resistance of the first resistor circuit and the second resistor circuit becomes constant, wherein the third resistor circuit comprises: a third resistor; a first transmission gate provided between a connection node of the third resistor and the first resistor circuit, and the output terminal; and a second transmission gate provided between a connection node of the third resistor and the second resistor circuit, and the output terminal, and wherein the third resistor has a resistance that is weighted according to the same binary code as the binary codes of the first resistor group and the second resistor group, and has a maximum weighted bit count.