1. Explain MOSFET construction, operation and pass characteristics;
2. Analyse high performance Dynamic CMOS circuits;
3. Explain the basic processing steps for fabricating the integrated circuits;
VLSI techniques (ELEC 30007) – Spring – 20 – CW2 (Assignment2)– QP
MEC_AMO_TEM_035_01 Page 1 of 7
Instructions to Student
Answer all questions.
Deadline of submission: 12/07/2020 23:59
The marks received on the assignment will be scaled down to the actual weightage
of the assignment which is 50 marks
Formative feedback on the complete assignment draft will be provided if the draft is
submitted at least 10 days before the final submission date.
Feedback after final evaluation will be provided by 23/07/2020
Module Learning Outcomes
The following LOs are achieved by the student by completing the assignment successfully
1. Explain MOSFET construction, operation and pass characteristics;
2. Analyse high performance Dynamic CMOS circuits;
3. Explain the basic processing steps for fabricating the integrated circuits;
Assignment Objective
The objective of the assignment is to ensure the achievement of the learning process related to MOSFET
operation, fabrication and concepts of dynamic CMOS circuits.
Assignment Tasks
`
IN SEMESTER (INDIVIDUAL) ASSIGNMENT
Module Code: ELEC 30007 Module Name: VLSI techniques
Level: 3 Max. Marks: 100
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MEC_AMO_TEM_035_01 Page 2 of 7
1. Consider a MOSFET built on p-type substrate having the following parameters VT0=1V,
|2ΦF|=0.54V, process trans-conductance=45 µA/V2
, γ=0.17V1/2
, λ=0.04V-1
a. Find the type of MOSFET. (3 Marks)
b. Determine the threshold voltage(VT) and W/L, When the transistor is biased with
VG=4V, VD=4V, VS=2V, and VB=0V and the drain current ID=0.87mA (11 Marks)
c. Calculate ID for VG=5V, VD=3V, VS=2.2V, and VB=0V. (11 Marks)
2.
a. Explain the processing steps for patterning a polysilicon layer as shown in Figure
1(a) to the structure as shown in Figure 1(b) with neat sketches. (15 Marks)
Figure 1 (a) Figure 1 (b)
b. Dynamic logic is considered to be temporary storage compared to static logic;
justify the statement. (3 Marks)
c. For the given domino logic circuit in Figure 1, during evaluation , if A=1, B=1, C=1
and D=0 will cause charge sharing and the input to the inverter will drop. The
minimum voltage required at the inverter input is 2.5V. What should be the
maximum CP/CL ratio to avoid charge sharing affect the correct output at F?
(7 Marks)
Figure 1
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MEC_AMO_TEM_035_01 Page 3 of 7
3.
a. Realize the given expression using
???? = ?(? + ?)? + ?
i. Psuedo NMOS logic ; (5 Marks)
ii. Dynamic Domino Logic (5 Marks)
b. Realize the following function using NORA CMOS Logic.
? = ((? + ?)
̅̅̅̅̅̅̅̅̅̅. (? + ?)
̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅
. ? + ?)
̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅
(15 Marks)
4.
a. Compare different logic families with reference to noise margin, fan-in, and power
dissipation and suggest suitable field of application. Include RTL, ECL and NMOS
logic family in your comparison. (12 Marks)
b. Compare an enhancement mode and depletion Mode MOS transistors in terms of
threshold voltage and operating conditions. (13 Marks)
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MEC_AMO_TEM_035_01 Page 4 of 7
Rules & Regulations:
All resources should be cited using CU Harvard style.
The final assignment must have a Title page, References/ bibliography using CU Harvard Style and
page numbers.
Title Page must have Assignment Name, Module name, Session, your name, ID, and the name of
the faculty.
Softcopy in word format is to be submitted through Turnitin link on Moodle.
Viva will be conducted after the assignment submission as per the dates informed earlier.
Guidelines:
< Assignment must be computer typed.
Font – Times New Roman
Font – Style – Regular
Font – Size – 12
Heading should be with Font Size 14, Bold, Capital and Underline.
Explain with suitable diagrams wherever required. Diagrams must be drawn using suitable
software or by pencil.
Each student has to do the assignment individually
You can refer books in eLibrary or use internet resource. But you should not cut and paste material
from internet nor provide photocopied material from books. The assignment answers should be
in your own words after understanding the matter from the above resources.
Important Policies to be followed
1. Student Academic Integrity Policy*:
MEC upholds the spirit of academic integrity in all forms of academic work and any form of violation
of academic integrity shall invite severe penalty. Any benefit obtained by indulging in the act of
violation of academic integrity shall be cancelled.
All cases of violation of academic integrity on the part of the student shall fall under any of the below
mentioned categories:
1. Plagiarism
2. Malpractice
3. Ghost Writing
4. Collusion
5. Other cases
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MEC_AMO_TEM_035_01 Page 5 of 7
If the student fails a module and has a proven case of academic integrity violation in this module, the
student is required to re-register the module. This is applicable to first and second offenders of
plagiarism.
1. Plagiarism
A. First offence of plagiarism
I. If a student is caught first time in an act of plagiarism during his/her course of study in
any assignment other than project work, the student will be allowed to re-submit the
assignment once, within a maximum period of one week. However, a penalty of
deduction of 25% of the marks obtained for the resubmitted work will be imposed.
II. Period of re-submission: The student will have to re-submit the work one week from the
date he or she is advised to re-submit.
III. If the re-submitted work is also found to be plagiarized, then that assessment will be
awarded a zero mark. Re-submission of the work beyond the maximum period of one
week will not be accepted and the assessment will be awarded a zero mark.
B. Second offence of plagiarism
If any student is caught second time in an act of plagiarism during his/her course of study (in a
subsequent semester), the student will directly be awarded zero for the work in which plagiarism
is detected. In such cases, the student will not be allowed to resubmit the work. A warning of
suspension shall be issued, and student has to sign an undertaking and undergo counselling
session in such cases.
2. Malpractice/Ghostwriting/Collusion
A. First offence of Malpractice/Ghostwriting/Collusion
If a student is caught in an act of Malpractice/Ghostwriting/Collusion for an assessment
component irrespective of coursework or end semester, the student shall fail the module
and shall be required to re-register the module
B. Second Offence of Malpractice/Ghostwriting/Collusion
If a student is caught a second time in an act of Malpractice/Ghostwriting/Collusion for
an assessment component irrespective of coursework or end semester, the student
shall fail the module. A warning of suspension shall be issued, and student has to sign
an undertaking and undergo counselling session in such cases.
3. Third Offence of Academic Integrity Violation
If a student is caught a third time in an act of Academic Integrity Violation for an assessment
component irrespective of coursework or end semester (in a subsequent semester), the student
shall fail the module and also shall be suspended for one semester from the College, as
recommended by institutional level academic committee, Chaired by the Associate Dean, Academic
Affairs.
4. Fourth Offence of Academic Integrity Violation:
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If a student is caught a fourth time in an act of Academic Integrity Violation for an assessment
component irrespective of coursework or end semester (in a subsequent semester), the student shall
fail the module and also shall be expelled from the College, as recommended by institutional level
academic committee, Chaired by the Associate Dean, Academic Affairs.
5. Other cases
If a student commits an act of academic integrity violation as per the definition of “other cases”
mentioned in the previous section or of a different nature, student’s case shall be forwarded to an
institutional level academic committee, Chaired by the Associate Dean, Academic Affairs. The
committee shall investigate the case by means of a viva and/or a disciplinary hearing and shall take
appropriate decision. The penalty that can be granted to a proven case of academic integrity violation
which falls in this category of “other cases” can be a warning/component zero/ module
fail/suspension/expulsion depending on the nature and gravity of the offence.
6. Types/Variations of Cases:
I. If plagiarism is detected in any component of one assessment, the deduction in marks will be
applicable for the whole assessment, even if only the component or part submission alone needs
to be resubmitted.
II. If plagiarism is detected in a group assessment, all students of the group will be considered as
having committed an act of plagiarism and the policy will then be applied to all students
III. If plagiarism is detected in any component of a group assessment, the deduction in marks will be
applicable for the whole assessment even if only the component or part submission alone needs
to be resubmitted.
All students of the group would be considered as having committed an act of plagiarism and the
policy will then be applied to all the students of the group.
IV. If the assessment consists of components or part submissions that could be a group assessment
component (e.g. group assignment) and an individual assessment component (e.g. individual
reflection), the following will be applicable:
a. If plagiarism is detected in the group assessment component, all students of the group
will be considered as having committed an act of plagiarism, The policy will then be
applied to all students of the group. Group assessment component will be resubmitted
as per the policy.
b. If plagiarism is detected in the individual assessment component, the individual
assessment component will be resubmitted and the policy will then be applied to that
student alone.
c. For both (a) and/or (b), the deduction in marks will be applicable for the whole
assessment.
* for further details Refer to MEC Student Academic Integrity Policy in Student Handbook.
2. Late Submission Regulations:
It is the students’ responsibility to check all relevant timelines related to assessments.
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MEC_AMO_TEM_035_01 Page 7 of 7
As per the Assessment Policy at MEC, late submissions are allowed for one week (5 working days)
for all UG modules with a penalty. In such cases, a deduction of 5% of the marks obtained for the
submitted work shall be imposed for each working day following the last date of submission
till the date of actual submission. Assessment documents submitted beyond a period of one
week (5 working days) after the last date of submission will not be accepted and will be awarded
a zero for that assessment. In cases where the submission has been delayed due to extenuating
circumstances, the student may be permitted to submit the work without imposing the late
submission policy stated above. The extended period of submission will be one week from the
original last date of submission. In such cases, the student is expected to submit the supporting
certificates on or before the original last date of submission of the assessment and the decision
of extension rests with faculty responsible for the assessment .The late submission policy shall be
applied if the student fails to submit the work within one week of the original last date of
submission.
Students may contact their teachers for clarification on specific details of the submission time if
required.
3. Research Ethics and Biosafety Policy
To protect and respect the rights, dignity, health, safety, and privacy of research subjects involved
including the welfare of animals and the integrity of environment, all student projects are
expected to be undertaken as per the MEC Research Ethics and Biosafety Policy. Accordingly the
following shall apply.
Research and other enterprise activities shall be conducted by maintaining the high ethical
standards consistent with national and international standards and conventions.
Any research at MEC that is categorized as high-risk research shall be subject to review and
approval by the Research Ethics and Biosafety Committee.
Research activities involving collection of human or animal tissues and manipulation of microbial,
animal or plant cells shall be subject to review and approval by the Research Ethics and Biosafety
Committee.
Participants involved in research must be informed about the purpose of research and intended
uses of research findings. Written consent must be obtained from people involved prior to the
commencement of research.
Data obtained from participants must be treated with high confidence and should be used only
for the intended purpose of research.
Assessment Evaluation Criteria
Marking scheme for each question and subparts are mentioned in the tasks. The marks awarded
will be based on clarity of steps, diagram, and explanation.
