| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that voltage having flat temperature characteristics cannot be generated due to variations in characteristics of elements and as such a constant reference voltage cannot be generated with high accuracy.SOLUTION: According to an embodiment, a reference voltage generator circuit 1 comprises; a pair of bipolar transistors Q1, Q2; a voltage generator section 2 which amplifies a difference in band-gap voltage and outputs the same as a reference voltage; an output stage resistor R3 and a resistor divider circuit 4; a low temperature region temperature compensation circuit 16 which is fed with tap voltage from the resistor divider circuit 4, temperature-proportional voltage, and current from a first current source and outputs first correction current; a high temperature region temperature compensation circuit 17 which is fed with another tap voltage, the temperature-proportional voltage, and current from a second current source and outputs second correction current; and a current mirror circuit 6 which generates mirror current Icorr from each correction current and outputs the same to a node between the output sage resistor R3 and the resistor divider circuit 4. Temperature characteristics of the reference voltage are corrected by feeding back the reference voltage to commonly connected base electrodes of the bipolar transistors Q1, Q2. |
