Estimate the rise time

Source: MIT. Course 6.375. Lecture L06. 2006

Estimate the rise time

1. Width of transistor is found by multiplying the scaling factor (16/8/2/1) with the minimum width of transistor which is 0.5 m.

2. Multiply Cg,N/Cg,P/Cd,N/Cd,P with the width of the transistor to get the drain/gate capaciatances for P and N transistors.

3. Wider transistor more capacitance

Divide Reff,N/Reff,P with the width of the transistor to get the Resistance for the N and P transistors. Wider Transistor Less resistance.

The sheet resistance(0.07) is for unit square. Since the wire width is 0,25m. The

Source: MIT. Course 6.375. Lecture L06. 2006resistance for 1 m X 0.25 um wire is 0.07/0.25. This factor is multiplied by the length 250 m

The wire capacitance is made up of two parts: Bottom (area) capacitance found using 250 X 0.25 (area) X CA,M2.Side capacitance is found by multiplying length 250 XCL,M32

The factor 2.2 comes from 90% swing loge(9)