Adjustable Reference Voltage Design

[Willt]

Hi experts,

Is there any paper or document related to adjustable reference voltage design?

For example, I want a supply-independent reference voltage which can be tuned using control signal (digital or analog).
Is it possible to implement such kind of circuit?

Your comment and guidance are highly appreciated. Thank you in advance.

Best regards,
Will

 

[jerryzhao]

If you want to calibrate the refrence voltage by control signal. You can use the MOS switch control one of ratio resistors. example the bandgap's output equal Vbe+(R2/R1)ΔVbe, you can control the R2 by MOS switch, and digtal contral the switch.
If you want to get the different reference voltage(such as 1V or 2V), you can use the switch contral the divider resistor.