Question

MIDTERM solution formulae for question 2

Answer 1

VS=5.0V, VOH=4.5V, VIH=4.0V, VIL=1.5V, VOL=1.0V.
What is the low noise margin (in Volts)? VIL-VOL=0.5
What is the high noise margin (in Volts)? VOH-VIH=0.5
What is the width of the forbidden region (in Volts)? VIH-VIL=2.5


Vout=Vs*RON/(RON+RPULLUP). (for nor and not gate)
Vout=Vs*2*RON/(2*RON+RPULLUP).
Vout is lower than VOL
find rpullup

What is the maximum power (in Watts) consumed by the inverter? VS^2/(RON+RPULLUP) 2.6315
What is the maximum power (in Watts) consumed by the NAND?
VS^2/(2RON+RPULLUP)
What is the maximum power (in Watts) consumed by the NOR?
VS^2/(RON+RPULLUP)

Answer 2

The static discipline required for this family is:

VS=5.0V, VOH=4.5V, VIH=4.0V, VIL=1.5V, VOL=1.0V.
What is the low noise margin (in Volts)?
correct

What is the high noise margin (in Volts)?
correct

What is the width of the forbidden region (in Volts)?
correct

Suppose that the threshold voltage for the MOSFET is VT=2.0V and RON=10000.0Ω.

What is the minimum value of the pullup resistor RPuI (in Ohms) for which this inverter can obey the required static discipline?
incorrect

Now, consider the NAND gate of this family. What is the minimum value of the pullup resistor RPuA (in Ohms) for which this inverter can obey the required static discipline?
incorrect

How about the NOR gate of this family. What is the minimum value of the pullup resistor RPuO (in Ohms) for which this inverter can obey the required static discipline?
incorrect

Assume that we implemented this family with the minimum pullup resistors that you have already calculated.

What is the maximum power (in Watts) consumed by the inverter?
incorrect

What is the maximum power (in Watts) consumed by the NAND?
incorrect

What is the maximum power (in Watts) consumed by the NOR?

Answer 3

@lucky12345 nor gate power is wrong

Answer 4

What is the minimum value of the pullup resistor RPuI (in Ohms) for which this inverter can obey the required static discipline?

Answer: Rpull = [(Vs*Ron)/(VoL)] - Ron

Now, consider the NAND gate of this family. What is the minimum value of the pullup resistor RPuA (in Ohms) for which this inverter can obey the required static discipline?

Answer: Rpull = [(Vs*2*Ron)/(VoL)] - (2*Ron)


How about the NOR gate of this family. What is the minimum value of the pullup resistor RPuO (in Ohms) for which this inverter can obey the required static discipline?

Answer: Rpull = [(Vs*Ron)/(VoL)] - Ron

What is the maximum power (in Watts) consumed by the inverter?
Answer : Power = (Vs^2)/ (Rpull + Ron total)

What is the maximum power (in Watts) consumed by the NAND?
Answer : Power = (Vs^2)/ (Rpull + 2*Ron total)

What is the maximum power (in Watts) consumed by the NOR?
Answer : Power = (Vs^2)/ (Rpull + Ron||Ron)

Answer 5

heja
What is the minimum value of the pullup resistor RPuI (in Ohms) for which this inverter can obey the required static discipline?
40000
Now, consider the NAND gate of this family. What is the minimum value of the pullup resistor RPuA (in Ohms) for which this inverter can obey the required static discipline?
80000
How about the NOR gate of this family. What is the minimum value of the pullup resistor RPuO (in Ohms) for which this inverter can obey the required static discipline?
40000
What is the maximum power (in Watts) consumed by the inverter?
0.0005
What is the maximum power (in Watts) consumed by the NAND?
4.166666667e-4
What is the maximum power (in Watts) consumed by the NOR?
5.555555556e-4

Answer 6

i am sorry
power for the last part is
Power = (Vs^2)/ (Rpull + Ron||Ron)

Answer 7

im closing the question done it .... rap up brothas

Answer 8

@lucky12345 no prob moving to question 3 i have got two wrongs nad no chance of error

Answer 9

what do you mean by ron total

Answer 10

Ron=10000 in ur case

Answer 11

By Ron total i mean , that see how many mosfet are connected ? for e.g in nand , 2 mosfet are connected which means that Ron total = Ron + Ron

Answer 12

@lucky12345 4.166666667e-4 is wrong for some reason?