| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reference voltage circuit which reduces the influence of an offset and finely adjusts temperature dependency so that a reference voltage can come closer to a target value, and to provide a semiconductor integrated circuit. <P>SOLUTION: The reference voltage circuit includes: a first amplifier AMPBM1 which has first and second input terminals and outputs a reference voltage VBGR; a first load element R1 and a first pn junction element Q1; second and third load elements R2 and R3 and a second pn junction element Q2; an offset voltage reduction circuit AMPBS1 for reducing an offset voltage between the first and second input terminals in the first amplifier; a connection node potential drawing circuit REG1 for drawing the potential of first and second connection nodes IP and IM; and area adjustment circuits PNPB1 and CAREA for adjusting the area of the second pn junction element Q2 according to the potential of the first and second connection nodes which has been drawn by the connection node potential drawing circuit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
