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US 2008/0164937 A1Published application
Band gap reference circuit which performs trimming using additional resistor
AssigneeSamsung Electronics Co., Ltd.
InventorHyung-seuk KIM
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Abstract
A band gap reference circuit incorporating resistive trimming is disclosed. The band gap reference circuit includes an additional trimming resistor and a trimming unit which performs trimming by changing a resistance value of the trimming resistor.
Claims18
A band gap reference circuit generating a reference voltage, comprising:
- first and second MOS transistors response to a bias voltage and respectively generating outputs at a first and second voltage node;
- first and second diodes respectively series connected between the first and second MOS transistors and ground;
- a first resistor connected between the second voltage node and the second diode;
- a second resistor connected in parallel with the first resistor and the second diode between the second voltage node and ground;
- a trimming resistor having a variable resistance defined by a trimming unit and connected between the first voltage node and the first diode;
- and
- a third resistor connected in parallel with the trimming resistor and the first diode between the first voltage node and ground.
4 more elements
Dependencies are inferred from the claim text.