All problems in this Assignment must be solved using the GFUS 130 nm process.Please email the assignment report to the TA. *Please use VDD of 1.2 V *Minimum W/L is

130 nm process is 160 nm/120 nm for the low voltage devices Design a 5-stage ring oscillator as shown in the Figure below. Start with using L=140 nm for both NMOS and PMOS. Select any W's for PMOS and NMOS. To start the ring oscillator use an enable switch with the Drain connected to VDD, and Gate connected to an Enable signal. [100 Points] A. Find the oscillation frequency when the W of PMOS is 10 times that of NMOS. B. Find the oscillation frequency when the W of NMOS is 10 times that of PMOS. C. Find the oscillation frequency when the W of PMOS is 3 times that of NMOS.