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US 2015/0309525 A1Published application
Voltage Reference
AssigneeTexas Instruments Incorporated
InventorsXiao Pu, Krishnaswamy Nagaraj, Yue Hu
Life of this patent
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Abstract
A voltage reference circuit includes a bipolar transistor and a circuit configured to measure the ratio of emitter current to base current of the bipolar transistor. The output voltage of the voltage reference circuit is compensated as a function of the measured ratio.
Claims20
A voltage reference circuit having an output voltage, the circuit comprising:
- a bipolar transistor having a base and an emitter;
- a circuit configured to measure the ratio of emitter current to base current of the bipolar transistor;
- and
- the output voltage being compensated as a function of the measured ratio.
1 more element
A method, comprising:
- measuring, by a circuit, the ratio of emitter current to base current of a bipolar transistor;
- and
- trimming, by a processor, a first resistance in a voltage reference circuit, to adjust an output of the voltage reference circuit as a function of the measured ratio.
Dependencies are inferred from the claim text.