Bandgap current architecture optimized for size and accuracy
Abstract:
A low voltage bandgap reference circuit (200) is provided which includes a first current generator (202) having first and second circuit branches which include, respectively, first and second bipolar transistors having different sizing reference values for generating a first current at a first resistor that varies proportionally as a function of temperature; a second current generator (204, 205) having a third circuit branch which includes one or more field effect transistors and no bipolar transistors for generating a second current that varies inversely as a function of temperature; and a third circuit (206) connected to generate a bandgap reference current in response to the first current and the second current.
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