Exam 1
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University of Sharjah College of Engineering Department of Electrical and Computer Engineering 0403452 – VLSI System Design Spring 2004/2005 Exam 1 Course Objective Coverage:
Objective 1 Objective 2 Objective 3 Objective 4 Objective 5 Objective 6
Degree of Coverage (0 – 4) 3
Student ID
THIS IS A CLSED BOOK EXAM. SHOW ALL STEPS FOR FULL CREDIT.
VLSI System Design
Dr. Bassel Soudan
1
Objective 1.
1.1
The ability to design and create design-rule correct layout for static CMOS circuits.
Using the following Voltage Transfer Curve of a CMOS Inverter, show the different operating regions and mark the location of the following voltages: VIL, VIH, VOL, VOH and VM. (VT for each of the two transistors is 1 V and the inverter is symmetric). (5 Points)
Vout
VIN
1.2
For a CMOS inverter, write the important relations needed to calculate VIL and Vout(VIL). (3 Points) Don’t calculate just show the equations.
VLSI System Design
Dr. Bassel Soudan
2
1.3
Fill the truth table to determine the function implemented by the following circuit
(7 Points)
P2
P1
P3
Y N2
N1
X
N3
F X
Y
N1
P1
N2
P2
N3
P3
F F=
1.4
Draw the schematic (transistor circuit) for a complex CMOS gate that implements the following function: (10 Points)
F = (( A + B)( B + C )) + ( DE ) The complements of the variables are NOT available.
VLSI System Design
Dr. Bassel Soudan
3
1.5
Show the Euler Paths for the NMOS and PMOS parts of the circuit for the function shown in question 1.3. Indicate the best transistor sequence for layout. (8 Points)
Transistor Sequence
1.6
Using the grid below, draw the best possible layout for the function shown in question 1.3 (7 Points)
VLSI System Design
Dr. Bassel Soudan
4
Important equations: •
NMOS o Linear Mode:
o Saturation Mode:
•
2 ⎡ VDS ⎤ I D = k ⎢(VGS − VT )VDS − ⎥ 2 ⎦ ⎣ k I D = (VGS − VT ) 2 2
[
]
PMOS o Linear Mode:
o Saturation Mode:
VLSI System Design
2 ⎡ VSD ⎤ I D = k ⎢(VSG + VT )VSD − ⎥ 2 ⎣ ⎦ k I D = (VSG + VT ) 2 2
[
]
Dr. Bassel Soudan
5
Objective 1 Objective 2 Objective 3 Objective 4 Objective 5 Objective 6
Degree of Coverage (0 – 4) 3
Student ID
THIS IS A CLSED BOOK EXAM. SHOW ALL STEPS FOR FULL CREDIT.
VLSI System Design
Dr. Bassel Soudan
1
Objective 1.
1.1
The ability to design and create design-rule correct layout for static CMOS circuits.
Using the following Voltage Transfer Curve of a CMOS Inverter, show the different operating regions and mark the location of the following voltages: VIL, VIH, VOL, VOH and VM. (VT for each of the two transistors is 1 V and the inverter is symmetric). (5 Points)
Vout
VIN
1.2
For a CMOS inverter, write the important relations needed to calculate VIL and Vout(VIL). (3 Points) Don’t calculate just show the equations.
VLSI System Design
Dr. Bassel Soudan
2
1.3
Fill the truth table to determine the function implemented by the following circuit
(7 Points)
P2
P1
P3
Y N2
N1
X
N3
F X
Y
N1
P1
N2
P2
N3
P3
F F=
1.4
Draw the schematic (transistor circuit) for a complex CMOS gate that implements the following function: (10 Points)
F = (( A + B)( B + C )) + ( DE ) The complements of the variables are NOT available.
VLSI System Design
Dr. Bassel Soudan
3
1.5
Show the Euler Paths for the NMOS and PMOS parts of the circuit for the function shown in question 1.3. Indicate the best transistor sequence for layout. (8 Points)
Transistor Sequence
1.6
Using the grid below, draw the best possible layout for the function shown in question 1.3 (7 Points)
VLSI System Design
Dr. Bassel Soudan
4
Important equations: •
NMOS o Linear Mode:
o Saturation Mode:
•
2 ⎡ VDS ⎤ I D = k ⎢(VGS − VT )VDS − ⎥ 2 ⎦ ⎣ k I D = (VGS − VT ) 2 2
[
]
PMOS o Linear Mode:
o Saturation Mode:
VLSI System Design
2 ⎡ VSD ⎤ I D = k ⎢(VSG + VT )VSD − ⎥ 2 ⎣ ⎦ k I D = (VSG + VT ) 2 2
[
]
Dr. Bassel Soudan
5
