diarmuid
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Hello,
I know that the bandgap voltage is equal to Vbe + delta(Vbe) * scaler, where the scaler is sized so as to cancel the
-ive temperature co-efficient of Vbe.
Eg. Vbg = Vbe + (Vtln)(1+(R2/R3)) .... Ref: Razavi page 385
The possible values for Vbg seem to be always around the 1.2V mark.
However, I have seen 1.024V as a commonly quoted bandgap voltage.
1.) How can you be so precise with this voltage?
2.) Why is it so common?
3.) What type of bandgap circuit can generate it (example of a schematic would be very helpful here)?
Thanks in advance!
Diarmuid
I know that the bandgap voltage is equal to Vbe + delta(Vbe) * scaler, where the scaler is sized so as to cancel the
-ive temperature co-efficient of Vbe.
Eg. Vbg = Vbe + (Vtln)(1+(R2/R3)) .... Ref: Razavi page 385
The possible values for Vbg seem to be always around the 1.2V mark.
However, I have seen 1.024V as a commonly quoted bandgap voltage.
1.) How can you be so precise with this voltage?
2.) Why is it so common?
3.) What type of bandgap circuit can generate it (example of a schematic would be very helpful here)?
Thanks in advance!
Diarmuid