| 摘要 |
A bandgap reference (BGR) circuit of the present invention includes a first serial circuit made up of a first diode, a first transistor, and a first resistor. A second serial circuit includes a second diode having a greater current feed area than the first diode, a second transistor, and a second resistor. An amplifier amplifies a difference between the voltage drop of the first resistor and that of the second resistor. A third serial circuit includes a third transistor control led by the output of the amplifier, a third resistor and a fourth resistor, and a third diode. Opposite ends of the fourth resistor are respectively connected to the gate of the first transistor and the gate of the second transistor. A reference voltage appears on opposite ends of the portion of the third serial circuit including the third resistor, fourth resistor, and third diode.
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