| 摘要 |
PROBLEM TO BE SOLVED: To provide a reference voltage source circuit and a temperature detection circuit that provide higher accuracy and that are easy to manufacture. SOLUTION: The reference voltage source circuit comprises a current mirror circuit including a first and a second field-effect transistor; and a third and a fourth field-effect transistor each having a polysilicon gate such that the conductivity type of a gate electrode has a different polarity. The first and third field-effect transistors are connected in series with each other and the second and fourth field-effect transistors are connected in series with each other. In this way, a voltage due to a work function difference is generated. The temperature detection circuit comprises two voltage sources that differ in the current mirror ratio of the current mirror circuit, and a subtractor for subtracting the output voltages of the two voltage sources. COPYRIGHT: (C)2009,JPO&INPIT |
