DEPARTMENT OF ELECTRICAL,COMPUTER AND BIOMEDICAL ENGINEERING
2nd semester (07/03/2022 - 17/06/2022)
82 lesson hours
WRITTEN AND ORAL TEST
Basic knowledge of Analog Electronics and Electrical Communications
This course is aimed at introducing students to the design of integrated transceivers for wireless communications. At the end, attendees will have gained knowledge of fundamental parameters describing system performances, insights into alternative processing architectures and ability to design the following building blocks: low noise amplifiers, up and down converters, power amplifier, phase locked loop, phase detector, filter, voltage controlled oscillator, frequency synthesizer. As an example, the design of a complete transceiver will be described starting from the specifications of a telecommunication application, such as GSM, W-CDMA, WLAN. Based on computer aided design experience carried out in the Laboratory, the student will be able to finalize the design of single blocks integrated in most advanced CMOS nodes and will be ready for the design of complete transceivers.
Modulation and Demodulation
Amplitude Modulation, Quadrature Amplitude modulation and demodulation. Digital constellation and M-QAM. Constant envelope modulations (FSK, PSK). Multiple Access techniques.
RF Transceiver impairments
I-Q mismatch, compression, phase noise. Noise and noise figure. Non-linear distortion, compression desensitization and intermodulation. Examples of specifications for popular wireless standards
Direct conversion and double conversion architectures. The problem of the image. Image-reject downconverters.
Low Noise Amplifier
Common-source LNA. Inductively degenerated amplifier. Common-gate amplifier. Noise-cancelling amplifiers
Introduction. Switching mixer: conversion gain and noise figure. Single-balanced and double balanced mixers. Passive mixers.
Oscillators principles. Large signal operation. Phase noise analysis. Voltage-controlled oscillators
Phase Locked Loop and Frequency synthesizer.
Type-I and Type-II PLL. Phase and frequency detectors. Issues of spurs and phase noise in PLL. Building blocks: charge-pump, crystal oscillator, high-speed dividers. Integer and fractional frequency synthesis
Specifications. Class A,B,C,D,E,F amplifiers. Transmitter architectures for switch-mode amplifiers.
Lectures (hours/year in lecture theatre):50
Exercises (hours/year in lecture theatre):15
Practical class (hours/year in lecture theatre): 12
Reccomended or required readings
B. Razavi. RF Microelectronic circuits. Prentice Hall PTR, Upper Saddle River, NJ 07458.
The examination includes questions with multiple answers and excercises to be solved by the student. Further oral discussion is possible upon student request. No inter-mediate examination is foreseen.
Sustainable development goals - Agenda 2030