| 摘要 |
A start signal is supplied to MOS transistor Q8, MOS transistor Q8 is turned on, the first current mirror circuit is driven, and the same mirror current flows in MOS transistors Q4-Q7 . Then, of two MOS transistors Q8 and Q9 that compose the second current mirror circuit, to MOS transistor Q8 is connected a resistor R2 and to MOS transistor Q9 is supplied a reference signal (Vref). According to such a configuration, reference current (Iref) that is generated in resistor R2 becomes current corresponding to the reference voltage (Vref), and thereby output current (Iout) is outputted from MOS transistor Q7 based on this reference current (Iref).
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