Question

a. Draw a CMOS inverter and for its transfer characteristic shown below, label VOH, VOL, VIH, VIL, VM, NMH, NML Assume VDD=5V. Give the values of VM, VOH, and VOL. b. Implement Y = (A+B).C using CMOS

Answer 1

a)

CMOS INVERTER

The CMOS inverter circuit is shown below. When the input A=0 output Y=1 and when A=1 , Y=0

NOTE:: (PMOS turns ON when the input is 0 and turns OFF when the input is 1. NMOS turns ON when the input is 1 and turns OFF when the input is 0)

CMOS INVERTER VOD CS Scanned with CamScanner

The transfer characteristics are labeled as asked.

The calculations are below

TH TE HHHHH TTTTTTTTTTH THEIR HHHHH ENME MI TI HUMAN SC RE

By seeing the graph it is easy to remember and identify. Don't go for the definitions as they will confuse you.

b)

By Assuming Voo=su. Vm= Voo - Su = 2.50 VOH = V0o = sv fes Scanned with VOL = CamScanner OV.

Remember the following things while designing a CMOS design circuit

1) Blindly follow the Rule number 1 and 2 as mentioned in the image.

2)PMOS turns ON when the input is 0 and turns OFF when the input is 1. NMOS turns ON when the input is 1 and turns OFF when the input is 0.

3) If the expression doesn't contain a whole negation or inverse symbol place an extra inverter to the design.

4) Pull Up network consists only PMOS and Pull down network consists only NMOS.

5) The output should be in between the pull up and pull down networks.

The required design is shown below.

Implement y = (A + B).C using (mos Rule i- 't Rulea - som (pmos series NMOS Parallel) Product (Pmos parallel Nmos series) VDO. 1 Pull up Network 7T o y =(A+B). 1 - Pull down Network S Scanned with el camScanner Po

I hope the explanation satisfies you

If not i will improve myself

Thanks for the question

Have a nice day sir