Question

Part I: In this problem, you will explore a new type of oscillators "Ring Oscillator" (RO) which is highly used in digital systems. Use an RO based on "NOT gates" to design a 100 MHz oscillator to be used for some mircocontrollers. Draw the circuit showing the number of stages and any RC you used (if applicable). Conisder ONLY commercialized NOT gates "logic inverters and provide the parts numbers. You may consult Digikey or other components suppliers. "This question will have higher weight in grading than others!

Answer 1

Detailed and stepwise solution is provided in the images down below, please refer it. If you have any doubt ask me in the comments, i will try to help. If you like the solution do give a thumbs up. You can also search for commercial not gates other than this with 1ns propagation delay.
Sol. We have to design a ring Oscillator with 100 MHz frequency based on NOT Gates e > We will use 5 NOT gates for - this design OUF » Let each and have NOT gates are identiche Ins of propagation delay Itt ut nih bo T = Time taken to t oolla 2 st switch from high to low T = T2 / All guty stig are identicle T2 = Time to switch from - + + As there are 5 NOT gates each transition. require (5Th. and it to 100 Mn 2 cl To = I us I To = 0.01 MS.

To : T + Iz i 0.olus - ST 45T = 0.olms T= 0.01 Ms 10 Propagation T = ans delay & so for this design we requiere ans delay for all 5 NOT gates. (ins delaly) Commericial NOT gate = 296-11599-6-ND This has max. of 3. the delay (Digikey part numbe)