Talk:Bandgap voltage reference

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The schematic has resistors labelled R1 and R2 but these are not the first and second resistor mentioned in the text and it is therefore totally confused. — Preceding unsigned comment added by 2001:630:212:238:62A4:4CFF:FED0:3B32 (talk) 14:52, 29 January 2015 (UTC)[reply]

"The resulting voltage is about 1.2–1.3 V, depending on the particular technology and circuit design, and is close to the theoretical 1.22 eV bandgap of silicon at 0 K." Can someone explain in what way it makes sense to compare Voltage and Energy (eV) ? Intellec7 (talk) 18:45, 7 November 2016 (UTC)[reply]

see Electronvolt article intro: "a measure of an amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum." Em3rgent0rdr (talk) 00:28, 20 January 2024 (UTC)[reply]

Should add a graph of the circuit's linear extrapolation of bandgap to reach its determination of 0K reference.

For now I've written as: "the resulting voltage is about 1.2–1.3 V for silicon (Si). Although silicon's band gap at 0 K is technically 1.165 eV, the circuit essentially linearly extrapolates the curve to reach its reference voltage,^[1]..."

I quickly cited two university slides showing this extrapolation. A picture is worth a thousand words, so maybe someone can find or create a creative-commons/public domain graph showing this extrapolation, to help clarify why the bandgap reference circuit calculates a slightly higher voltage than the actual corresponding bandgap. Em3rgent0rdr (talk) 00:32, 20 January 2024 (UTC)[reply]

References

^ https://people.engr.tamu.edu/s-sanchez/607%20Lect%204%20Bandgap-2009.pdf slides 8-9 and https://users.wpi.edu/~mcneill/handouts/BandgapPrinciple.pdf graph this linear extrapolation

[1] ttps://people.engr.tamu.edu/s-sanchez/607%20Lect%204%20Bandgap-2009.pdf slides 8-9 and https://users.wpi.edu/~mcneill/handouts/BandgapPrinciple.pdf graph this linear extrapolation

[1]