| 摘要 |
A reference voltage circuit includes three PMOS transistors and two NMOS transistors. The three PMOS transistors constitute a current mirror circuit and the two NMOS transistors constitute a load circuit. A dummy NMOS transistor is added to the load circuit so as to make three NMOS transistors correspond to the three PMOS transistors and a ratio of currents leaking through PN junctions of diffusion layers on the side of the current mirror circuit is set equal to a ratio of currents leaking through PN junctions of diffusion layers on the side of the load circuit. This allows the reference voltage circuit to output a reference voltage that does not change with temperature even at high temperatures.
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