Vt vs Temperature

Vt decreases as temperature rises, following the relation Vt(T) = Vt(Tr) - K(T - Tr), where Tr is room temperature and K is a constant factor.

KEY Vt falls with rising temperature per Vt(T) = Vt(Tr) - K(T - Tr).

Mobility vs Temperature

Mobility decreases as temperature rises. Higher temperature generates more charge carriers, which collide more often with one another, and this increased scattering reduces carrier mobility.

KEY Higher temperature increases carrier scattering, so mobility drops.

Mobility's Limit with Temperature

Yes - mobility continues to fall as temperature continues to rise.

KEY Yes, mobility keeps decreasing with rising temperature.

PMOS vs NMOS Mobility

Electron mobility is always higher than hole mobility - electrons move roughly 2 to 2.5 times faster than holes.

KEY Electron mobility is about 2-2.5x higher than hole mobility.

Isolation Cells - AND vs OR Gate

• An isolation cell sits at the interface where a signal crosses from a switchable power domain to an always-on (AON) domain, with both domains operating at the same voltage.
• Its main purpose is to stop an unknown logic value from the switchable domain from propagating into the AON domain when the switchable domain is powered off.
• Without it, the unknown value reaching the AON domain can cause metastability (a level between 0 and 1) and dissipate short-circuit power.
• An AND-gate isolation cell uses an isolation control signal of 0 from the power management block to clamp the output and block the unknown value.
• An OR-gate isolation cell uses an isolation control signal of 1 from