| 摘要 |
PROBLEM TO BE SOLVED: To provide a bias current circuit whose current consumption is small and small in fluctuation of a load current even when noise is superimposed upon a power source. SOLUTION: A source of a PMOS 19 is connected to a high potential side Vcc of a power source E, a drain of the PMOS 19 is connected to a source of a PMOS 18 of an output transistor, a drain of the PMOS 18 is connected to a differential amplifier or a load 60 of a comparator, the drain of the PMOS 19 is connected to a high potential side of a temperature compensation circuit 50, a gate of the PMOS 18, an end of a capacitor 17 and a drain of a PMOS 11 which constitutes a temperature compensation circuit 50 are connected with one another, and other end of the capacitor 17 is connected to a ground 101. It is possible to attain reduction of a current consumption of the bias current circuit by making an Iref 20 and an Iref 30 zero when this bias current circuit is interrupted.
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