| 摘要 |
PURPOSE: An internal reference voltage generator circuit is provided to be capable of adjusting an internal reference voltage in accordance with a temperature variation. CONSTITUTION: An internal reference voltage generator circuit comprises a differential amplifier(41), a resistor(R2), a PMOS transistor(P4), and a temperature-dependent variable voltage generator(43). The differential amplifier(41) amplifies the first reference voltage(VREF1) and an input voltage(VIN) to output an internal reference voltage. The resistor(R2) is connected between the second reference voltage(VSS) and the second input terminal(I2) of the differential amplifier(41). The PMOS transistor(P4) is connected between an output terminal(O1) of the amplifier(41) and the second input terminal(I2), and has a gate connected to receive an output voltage(VTEMP) of the temperature-dependent variable voltage generator(43). The temperature-dependent variable voltage generator(43) receives the third reference voltage(VREF2) and generates the output voltage(VTEMP) that is variable according to a temperature variation. A resistance value of the PMOS transistor(P4) is varied by the variable output voltage(VTEMP).
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