| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve enhancement of operational reliability. <P>SOLUTION: A constant current source circuit comprises: a first current generating circuit 10 provided with a first current mirror circuit 11 including a plurality of PMOS transistors and a second current mirror circuit 12 including a plurality of NMOS transistors for generating a first current having positive temperature characteristics; a second current generating circuit 20 provided with a feedback circuit 21 that depends on a threshold voltage of the plurality of NMOS transistors, is input with a first voltage having negative temperature characteristics and outputs a second voltage equivalent to the first voltage for generating a second current having the negative temperature characteristics based on the second voltage; and a current combining circuit 30 for generating a constant current having any temperature characteristics by adding the first current and the second current. <P>COPYRIGHT: (C)2013,JPO&INPIT |
