4 ms·
> I wonder if it will be mitigated by requiring a larger minimum voltage? How would you detect low voltage without a reference voltage?
by baybal2 5y ago
> I wonder if it will be mitigated by requiring a larger minimum voltage?
How would you detect low voltage without a reference voltage?
- hashimotonomora 5y agop-n junctions have a threshold forward voltage.
- frumiousirc 5y agowhich is temperature dependent
- baybal2 5y agoWhich will not tell you anything without knowing the body bias voltage on CMOS, which is set relative to power rails.
- 95014_refugee 5y agoHow do you think "reference voltages" work? (Also, temperature sensors. Sheesh people.)
- omegalulw 5y agoYou can put a diode and see if it turns or. Or manufacture a transistor with the specific gate voltage and see if that turns on. You would have to account for things like low inductance (to protect against short, sharp dips), etc. Obviously this is a very naive solution, but the point is you don't need a high enough reference voltage.
- labcomputer 5y agoResistor voltage divider on the power rail, plus a voltage reference that runs well below the minimum voltage of the part. Both go to a comparator, which outputs to whatever you want (like hold the part in power on reset)