The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Updated on March 18, 2011 by Alex
For ELEC 528 Spring 2011
Problem#1:
Use the cell LNA_PB in rfLib.
a)
Specify LNA Available pwr gain (dB) to be 10, Input resistance and Output resistance to be
50, Input referred IP3 (dBm) to be 15, Noise Figure (dB) to
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Receiver Architecture (Last revised Feb 15, 2012)
Preliminaries:
Any real modulated bandpass signal can be represented in one of three forms:
(a) Polar form: () = () cos( + ()
amplitude modulation
phasemodulation (excess phase)
total phase
Total phase ()
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Derivation of fT And fMAX
of a MOSFET
Derivation of fT (MOSFETs)
The unity current gain frequency* (aka
cutoff frequency)
Defined under the condition that the output
is loaded with an AC short.
fT does not depend on Rg and ro
1
Derivation of fT (MOSFETs
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Low Noise Amplifier Design
Design Issues
y
y
y
y
y
y
y
Noise Figure impacts receiver sensitivity
Impedance match want Zin = Zo (usually = 50 )
Power want low power dissipation
Gain high gain reduces impact of noise from components that follow the
LNA (suc
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Motivation for Study of Device Modeling at RF
Typical models predict transistor behavior accurately to ~ 100MHz.
RF Design is performed at a frequency in the range of 900MHz5GHz.
RF circuits typically have less topology complexity, but more sensitive to
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
ELEC5280
Homework #1 Solution
Spring 2014
Page 1
Problem 1.
All parameters from the graph above are listed in the table below
Parameter Unit
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Ap
Decibel
2.5
17
4
5
3
15
Ap
Linear
0.5623
50.1187
0.3981
3.16
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Prof. Patrick Yue
EESM 5920 Homework 1
Spring 2014
Due on Mar 10 (Wed) during lecture.
Problem 1.
(a) Calculate the cumulative voltage and power gain (from Port A to Port G) and (b) cumulative noise
factor for the receiver chain shown below. Note that Por
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
EESM 5920
Spring 2014
March 24, 2014
Patrick Yue
HighFrequency IntegratedCircuit Design
MIDTERMPROJECT  RECEIVER SYSTEM DESIGN
(DUE DATE: APRIL 11)
In this project, you are to design an integrated wireless receiver at the system level to meet
WLAN 802
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
EESM 5280
Spring 2014
Prof. Patrick Yue
HighFrequency IntegratedCircuit Design
HOMEWORK #2
(DUE DATE: MAR 24, 2014)
For this homework assignment, you will get familiar with both VerilogA in Cadence
and MATLAB for systemlevel behavior simulation.
Note:
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
IImpactt off CMOS scaling
li
on RF performance
Prof. C. Patrick Yue, ECE, UCSB Slide 1
NMOS ft Scaling Roadmap
I th
In
the velocity
l it saturation
t ti lilimit
it
vsat
2 Lg
y
y
gm depends on device width
only
Ft proportional to 1/L
1/L, not 1/L2
Ref. 6
P
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Spring 2014 EESM 5920
Homework #2 (3 Problems)
Due: April 21, 2014
Prof. Patrick Yue
Problem 1
In addition to the gain and phase mismatches caused by the polyphase filter, other factors such as the phase and gain
mismatch between the outputs of the LO als
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Last week
Prof. Yue showed that the SNR degrades from the TX output to RX output
Due to signal loss and noise introduced within the receiver
The allowable SNR degradation (Noise Figure) in the receiver is
determined by the following:
Tx Output
Noise Flo
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
EESM 592 0
March 24, 2014
HighFrequency IntegratedCircuit Design
MIDTERM PROJECT REPORT OUTLINE
(DUE DATE: APRIL 11)
The project report should be comprehensive, clear, and brief. Only one report is required
from each group, but the individual contribut
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Topics
q
RF Link Budge Examples
q
Receiver Sensitivity
RF Performance Parameters
Linearity
Noise Figure (NF)
Dynamic Range
Sensitivity
Power
Gain
CrossTalk
Prof. C. Patrick Yue
Slide 1
Fast Fading (Multipath or Rayleigh Fading)
q
Rayleigh Fading
q
q
Fixe
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Todays Agenda
Receiver basics
Channel selection why not at RF?
BPF first or LNA first?
Direct digitization of RF signal
Receiver architectures
Sub sampling receiver noise problem
Subsampling
Heterodyne receiver image problem
Superheterodyne receiver mor
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
ELEC5280 Tutorial Notes
Updated by Alvin on Feb. 12th, 2014
Tutorial for Simulating a Simple Receiver Using SpectreRF
A. Setting up Cadence
1. Download the packages, cds.lib, tutorials.tar, from the course webpage and put it
in the working directory of Ca
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
EESM 5920 Topics in Analog IC Systems and Design
q
Lecture:
Monday 7:15 10:0 PM
Room 2502
Prof. C. Patrick Yue. eepatrick@ust.hk, Room 2518
Prof. Mansun Chan, mchan@ust.hk, Room 2519
q
Instructor:
q
TA:
Contact:
Office:
q
Course Material: distributed thro
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Homework #4 Solution
Spring 2014
Problem #3.
Figure 1: Schematic for generic model simulation with ideal capacitors and inductors.
(a)
Figure 2: Rin = 12.37 mOhm.
Page 1
Homework #4 Solution
Spring 2014
Page 2
Figure 3: Cin 109.67 fF.
Please note that sma
The Hong Kong University of Science and Technology
RF basics
EESM 5920

Spring 2014
Prof. Patrick Yue
ELEC5280
Homework #4
Due: April 4, 2012 (Wednesday) during lecture. There are a total of 5 problems. The last three are design
problems which require extensive Cadence simulation, so start early!
This homework will count 2 times that of