Question

Find the propagation delay tp for a minimum-size inverter for which and

kn′=μnCox= 4kp′=4μpCox=380μA/V2,(W/L)n=(W/L)p=0.27μm/0.18μm,
VDD=1.8 V,Vtn= ∣Vtp∣=0.5 V, and the load capacitance is roughly 11.16fF.

What is the tp of this minimum-size inverter.

Answer 1

The propagation delay (tp) of a minimum-size inverter can be calculated using the formula tp = RC, where R is the resistance and C is the capacitance of the inverter. By substituting the values of R and C into the formula for tp, the propagation delay of the minimum-size inverter can be found.

Step-by-step explanation:

The propagation delay (tp) of a minimum-size inverter can be calculated using the formula tp = RC, where R is the resistance and C is the capacitance of the inverter.

In this case, the load capacitance is given as 11.16fF, and the resistance can be calculated using the MOSFET parameters. Using the given values for kn′, kp′, (W/L)n, (W/L)p, VDD, Vtn, and Vtp, the resistance can be calculated as R = (2/3) * (kn' * (W/L)n + kp' * (W/L)p) * (VDD - |Vtn|).

By substituting the values of R and C into the formula for tp, the propagation delay of the minimum-size inverter can be found.