Bandgap stability question

[laketravis2008]

bandgap stability

Appreciate if someone can explain why Bandgap's negative loop gain larger than positive loop gain will make Bandgap ckt stable. What happens if the bandap ckt is not stable, does it cause the Bandgap output reference voltage is not stable over temperature range.

 

[cinch]

Hi,
If the bandgap circuit is not stable, u will notice oscillations in the bandgap output voltage during transient simulation, when power supply is switched from 0 to Vdd.
In DC simulation, u ll not observe the effect of instability.

Regards,
Cinch