| 摘要 |
PROBLEM TO BE SOLVED: To realize stable and highly precise high speed start even under a lower power supply voltage without substantially increasing the circuit area. SOLUTION: A current mirror circuit is formed of NMOS transistors 10 and 12, and the same drain currents I are allowed to flow. A current mirror circuit is formed of PMOS transistors 14 and 16, and the drain currents I are supplied to the current mirror circuit. A resistance 18 applies offset between the respective source voltages of the PMOS transistors 14 and 16. A capacitor 22 for start-up is connected between the gate/drain of the diode-connected NMOS transistor 10 and the terminal of a positive electrode side power supply voltage VDD. Also, a capacitor 24 for start-up is connected between the gate/ drain of the diode-connected PMOS transistor 16 and a negative electrode side power supply voltage VSS.
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