Does impedance affect time delay in digital circuits?

[likephysics]

I recently attended a seminar, which said impedance increases with temperature, which results in timing delays in digital circuits. I don't understand how increase in impedance results in delay.

 

[berkeman]

I recently attended a seminar, which said impedance increases with temperature, which results in timing delays in digital circuits. I don't understand how increase in impedance results in delay.

The thermal coefficient of resistance varies for different materials. Resistance decreases for some semiconductors with increasing temperature, right?

So I assume they were talking about the metal traces in ICs and their thermal coefficient of resistance, which does increase with temperature. Since a big part of the delay in those IC traces is the RC delay, increasing the R (and not changing the C) will result in more delay.

 

[phinds]

I recently attended a seminar, which said impedance increases with temperature, which results in timing delays in digital circuits. I don't understand how increase in impedance results in delay.

You need a more specific quote, a reference to a particular circuit. It's possible that increased impedance could change the phase in some parts of a circuit but without any specific information, that is, just taken as a bald statement with no context, it makes no sense as far as I can see. For one thing not all impedance increases with temperature.