CPC G05F 3/30 (2013.01) [G05F 1/56 (2013.01); H03K 3/011 (2013.01); H03K 5/24 (2013.01)] | 15 Claims |
1. A bandgap reference circuit comprising:
a reference current generation circuit configured to output a bandgap reference current insensitive to a temperature change, by using a first voltage inversely proportional to temperature and a third voltage proportional to temperature, wherein the third voltage is a difference between the first voltage and a second voltage;
a resistivity temperature coefficient cancellation circuit configured to remove a first current proportional to temperature from the bandgap reference current by using the third voltage; and
a reference voltage generation circuit configured to output a bandgap reference voltage insensitive to a temperature change, by using a second current inversely proportional to temperature and a first resistor proportional to temperature, the second current being generated by removing the first current from the bandgap reference current.
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