Why is it necessary to supply highly stable DC voltages to Digital Systems?

[haswath]

Hi everyone

Why is it necessary to supply highly stable DC voltages to Digital Systems,

I guess it is related to noise margin or is there a reason for this ?

How much can it vary if it does?

 

[microe_victor]

Re: DC voltage

DC point is the work point for most of the digital device ,
If you have a look at "Inverter" which is the basic device of the digital circuit
you will get it

at least , a stable dc point is for the stabilization of the system
the turning point is floating if the DC is not stable