| 摘要 |
PROBLEM TO BE SOLVED: To generate a stable voltage of an accurate value with a low power consumption. SOLUTION: Divided voltages Vd1 to Vd4 generated by a voltage division circuit 23 are amplified by corresponding pairs of P-type driven operational amplifiers 241P to 244P and N-type driven operational amplifiers 241N to 244N. Output ends of respective pairs of operational amplifiers 241P to 244P and 241N to 244N are connected to common output terminals T1 to T4 through corresponding transistors Tr1 to Tr8. A transistor control circuit 245 alternately turns on/off two of transistors Tr1 to Tr8 which are connected to each of pairs of operational amplifiers 241P to 244P and 241N to 244N, and then, output voltages of P-type driven operational amplifiers 241P to 244P and those of N-type driven operational amplifiers 241N to 244N are alternately selected and are outputted from terminals T1 to T4.
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