ECE 5022 Homework IIIa
Due Date: Wed, October 15, 2014
Note:
1. Consider an RF receiver with the systems components as shown below
LNA
BPF
PGA
NF= 1.5 dB
G=15 dB
IIP3= -10 dBm
Loss= 1 dB
IIP3=
NF= 10 dB
G=25 dB
IIP3= -5 dBm
NF= 14 dB
G=20 dB
IIP3= +10 dB
ECE 5022 Homework II
Due Date: October 6, 2014
Note:
(a) Represent signal powers in dBm and gains in dB, unless specified otherwise.
(b) This homework also comprises a simulation problem on Microwave Office, which will
be due on Oct. 8th . All other compo
ECE 5022 Homework II
Due Date: October 6, 2014
Note:
(a) Represent signal powers in dBm and gains in dB, unless specified otherwise.
(b) This homework also comprises a simulation problem on Microwave Office, which will
be due on Oct. 8th . All other compo
ECE 5022 Homework IV-a
Due Date: Monday, October 28, 2013
1. Chapter 2 - Problem 1
Solution:
a)
Imaginary
PF
/B = /1350
Vmax
VRMS
2
VRMS
1 N 2
Vi,symbol = (1/4)X4X(x2+x2) = 2x2
N i 1
-x
and Vmax =
So, VRMS = x
Therefore, PF =
2
VRMS
Real
x
-x
[as all
ECE 5022 Homework I
Due Date: Wednesday 9/11/13
1. (a) Answer the following (Make sure you write the answer in the proper unit) :
(i) 7 dBm + 3 dB = 10 dBm = 1010/10 = 10 mW
(ii) 2 W x 2 = 4 W = 4103 mW = 10log10(4103) = 36 dBm
(iii) 2mW/1W= 2000 = 10log1
ECE 5021 Homework IV
Due Date: Friday 3/21/14
General Rules:
Make sure you capture your schematic and test bench for each of the problems
below (as applicable) in the solution sheet.
If you elected to print you output waveform, highlight your axis label
ECE 5022 Homework 5
Due Date: December 2, 2013
Q1. Consider the problem of mixing with the LO phase noise as shown below. The carrier
frequency is set at 1GHz.
(55=25)
-50 dBm
-110 dBm
IF
RF
990MHz 1GHz
LO
L(f)
[dBc/Hz]
Slope= -30 dB/dec
-100 dBc/Hz
Slope
Final Project Report Guidelines
Your final report should be written in professional manner and adhere to the highest quality
levels.
Your report should be typed in MS-word or any similar text S/W. Handwritten reports will
not be accepted.
Formatting: Sing
ECE 5021 Homework I
Due Date: Wednesday 2/5/14
General Rules:
Make sure you capture your schematic and test bench for each of the problems
below (as applicable) in the solution sheet.
If you elected to print you output waveform, highlight your axis labe
ECE 5022 Homework IV-a
1. Calculate the Peak Factors of QPSK, O-QPSK,
Due Date: Monday, Nov 10, 2014
QPSK and 8-PSK. Mention how those
results help in choosing the Dynamic Range of the Transmitter.
(8+2=10)
2. Chapter 2 - Problem 5
3. Lets consider that,
ECE 5021 Homework II
Due Date: Monday 2/17/14
General Rules:
Make sure you capture your schematic and test bench for each of the problems
below (as applicable) in the solution sheet.
If you elected to print you output waveform, highlight your axis label
ECE 5022: Introduction to RF Integrated Circuits
Fall 2014
Midterm
Exam Time: 80 min
Name: _
Sign the pledge. No Aid was given, received or observed.
Signature: _
NOTE:
(1) You are free to attempt either of Problem 4 or Problem 5
(2) Show your work and us
ECE 5022
Introduction to RF Systems
Lecture 4
Radio Propagation
Prof. Waleed Khalil
khalil@ece.osu.edu
1
Outline
LOS Propagation
Atmospheric Losses
NLOS Propagation
Multipath Fading
NLOS Path Loss Calculations
2
Radio Propagation
Unlike wired channels, w
ECE 5021 Homework III
Q1. For an nfet device with W=10m (use W per finger =2m, number of fingers =5), L=0.18m.
(i) Bias the device to set Id = 4mA and Vds=1.8V
Schematic:
Id
W=10m
L=0.18m
Vgs
Vds=1.8V
By running dc analysis and sweeping Vgs, we get Id = 4
ECE 5022
Introduction to RF Systems
Lecture 20
Phase Noise
Prof. Waleed Khalil
khalil@ece.osu.edu
1
Outline
Phase Noise Definition
Phase Noise Calculation
Impact of Phase Noise
2
It's All in The Timing
Timing is the #1 challenge to todays wireless or
ECE 5021 Homework I: Solved using the SOI PDK
Schematic:
W=10m
L=0.18m
Vgs
Vds
Ids (mA)
Q1. For an nfet device with W=10m (use W per finger =2m, number of fingers =5), L=0.18m, plot
the following:
(i) Id vs. Vds for Vds=0-1.8V (in steps of 0.1V) and Vgs =
ECE 5022 Homework IIIa
Due Date: Wed, October 15, 2014
Note:
1. Consider an RF receiver with the systems components as shown below
BPF
Loss= 1 dB
IIP3=
LNA
NF= 1.5 dB
G=15 dB
IIP3= -10 dBm
PGA
NF= 14 dB
G=20 dB
IIP3= +10 dBm
NF= 10 dB
G=25 dB
IIP3= -5 dB
Problem 1:
a) False.
Vdsat is typical lower than Vgs-Vt in short channel devices, and typically close to Vgs-Vt in
long channel devices.
b) False.
For high overdrive voltage, current decreases as temperature increase due to the decrease
in the mobility. F
ECE 5021 Sample Exam Questions
Problem 1: True or false (explain your answer)
a) The output resistance of a diode-connected MOS device is the same as the input
resistance of a common-gate amplifier?
b) The use of a cascode topology improves the bandwidth
ECE 620: Introduction to RF Integrated Circuits
Sample Midterm
Exam Time: 48 min
Attempt all 5 questions. Only the best 4 out of 5 questions will count
towards your final grade.
Show your work and use the space provided in this booklet.
You are allowed on
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ECE 5022
Introduction to RF Systems
Lecture 17
Modulation VI
Prof. Waleed Khalil
khalil@ece.osu.edu
1
Outline
Digital Modulation Schemes
Noise Impact and BER
Spectrum Limitation
2
Amplitude Shift Keying (ASK)
4-PSK
Multi-level states represented by pr
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ECE 5022
Introduction to RF Systems
Lecture 14
Modulation III
Prof. Waleed Khalil
khalil@ece.osu.edu
1
Outline
Signal and AWGN
Quadrature Modulation
2
Sum of Sinusoidal Signal and AWGN (1/3)
Adding a random noise signal with rms
noise Vnoise,RMS to a s