Analog Circuits

128 Pages·2013·5.334 MB·English

by  Yuping Wu

ANALOG CIRCUITS
Edited by Yuping Wu
Analog Circuits
http://dx.doi.org/10.5772/45891
Edited by Yuping Wu
Contributors
Tales Pimenta, Gustavo Della Colletta, Odilon Dutra, Paulo Cesar Crepaldi, Leonardo Zoccal, Luis Ferreira, Tomasz
Golonek, Piotr Jantos, Fawzi Mohammed Munir Al-Naima, Bessam Al-Jewad, Soumyasanta Laha, Savas Kaya, Zygmunt
Garczarczyk
Published by InTech
Janeza Trdine 9, 51000 Rijeka, Croatia
Copyright © 2013 InTech
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Publishing Process Manager Ana Pantar
Technical Editor InTech DTP team
Cover InTech Design team
First published January, 2013
Printed in Croatia
A free online edition of this book is available at www.intechopen.com
Additional hard copies can be obtained from [email protected]
Analog Circuits, Edited by Yuping Wu
p. cm.
ISBN 978-953-51-0930-3

Contents
Preface VII
Section 1 Circuit Design 1
Chapter 1 A Successive Approximation ADC using PWM Technique for
Bio-Medical Applications 3
Tales Cleber Pimenta, Gustavo Della Colletta, Odilon Dutra, Paulo C.
Crepaldi, Leonardo B. Zocal and Luis Henrique de C. Ferreira
Chapter 2 Radio Frequency IC Design with Nanoscale DG-MOSFETs 19
Soumyasanta Laha and Savas Kaya
Section 2 Analog CAD 49
Chapter 3 Memetic Method for Passive Filters Design 51
Tomasz Golonek and Jantos Piotr
Chapter 4 Interval Methods for Analog Circuits 69
Zygmunt Garczarczyk
Chapter 5 Fault Diagnosis in Analog Circuits via Symbolic Analysis
Techniques 91
Fawzi M Al-Naima and Bessam Z Al-Jewad

Preface
The invariable motif for analog design is to explore the new circuit topologies, architectures,
and CAD technologies as well as the traditional circuit and layout optimization to overcome
the design challenges coming from the new applications and new fabrication technologies.
The ADC design is explored with new architecture for bio-medical application in the
chapter A Successive Approximation ADC using PWM Technique for Bio-Medical
aApplications, the RFIC design is explored with one of the future mainstream fabrication
process in the chapter Radio Frequency IC Design with Nanoscale DG-MOSFETs , the
circuit synthesis for one of the key analog module circuit is explored in the chapter Memetic
Method for Passive Filters Design, one of the analog circuit analysis technologies is
explored in the chapter Interval Methods for Analog Circuits, and the fault diagnosis
method is explored in the chapter Fault Diagnosis in Analog Circuits via Symbolic
Analysis Techniques.
In the chapter A Successive Approximation ADC using PWM technique for bio-medical
applications a new architecture for a SAR A/D converter using the PWM technique in the
internal DAC stage is presented; the proposed architecture aims to eliminate the process
mismatches and thus minimize the errors. In order to validate this architecture, a 4bit A/D
converter has been simulated on Spectre simulator using BSIM3v3 model for a 0.5um CMOS
process. The power consumption is only 16mW for a power supply of 2.5V. The sample rate
was limited to 200Hz, regarding the circuit design and the maximum frequency achieved by
the CMOS process.
The chapter Radio Frequency IC Design with Nanoscale DG-MOSFETs presents an
exhaustive collection of DG-MOSFET based analog radio frequency integrated circuits of LC
oscillators, PA, LNA, RF Mixer, OOK Modulator, Envelope Detector and Charge Pump PFD
for today’s wireless communication, satellite navigation, sensor networks etc. Industry
standard SPICE simulations show that such RFICs with nanoscale DG-MOSFETs can
present the excellent performance.
In the chapter Memetic Method for Passive Filters Design the automated system for a
passive filter circuits design was presented. The circuit’s topology as well as its elements
values is optimized together in the MGP system. Thanks to the deterministic algorithm of
the local searching engaging (HJM), the speed of convergence to the well evaluated
solutions during the evolutionary computations grows significantly and the values of the
filter’s elements are adjusted to the most fitted ones for an actual circuit topology.
In the chapter Interval Methods for Analog Circuits, for the calculating of the operating
regions (solutions) for linear circuits, the circuits are described by linear interval equations
VIII Preface
with the circuit parameters done as the interval numbers, and an algorithm of iterative
evaluation of the bounds of operating regions is presented to calculate multidimensional
rectangular region bounding the set of operating points. For finding DC solutions of
nonlinear, inertial-less circuits, the predictor-corrector method controls the corrector step
with the sufficiently large predictor step and the corrector step not jumping to another
continuation path during solving the points of continuation path of a nonlinear equation;
and Krawczyk operator is used in n-dimensional box-searching of all solutions.
In the chapter Fault Diagnosis in Analog Circuits via Symbolic Analysis Techniques a
generalized fault diagnosis and verification approach for linear analog circuits was
discussed. A symbolic method is proposed to solve the testability problem during the
detection and location of the multiple faults in a linear analog circuit in frequency domain,
then to exactly evaluate the faulty parameter deviations.
Enjoy the book!
Yuping Wu
Professor
Institute of Microelectronics of CAS
Beijing, China
Section 1
Circuit Design