1. Homework 3
Given the circuit as shown below, and assume the RC tree is driven by a unit size inverter (BSIM3 model and default parameters), compute the Ceff at node s using the Macy’s method. R1 C1 s R2 C2 R4 C4 C3 R3 C5 R5
R1 = 1mΩ
R2 = 2mΩ
R3 = 2mΩ
R4 = 1mΩ
R5 = 4mΩ
C1 = 1nF
C2 = 1nF
C3 = 4nF
C4 = 4nF
C5 = 2nF

2. Steps for Problem 3
1. Write the SPICE netlist of the RC tree and the inverter driver.
2. Reduce the RC tree load to the RC-p load and estimate the rough range of Ceff.
3. Characterize the table γ=f(α,β) for the inverter using SPICE.
4. Follow the Macy’s method the get the Ceff for the RC-p load.