high-accuracy switched-capacitor techniques applied to filter - purl

279 Pages·2006·7.08 MB·English

H -A S -C T
IGH CCURACY WITCHED APACITOR ECHNIQUES
A T F A ADC D
PPLIED O ILTER ND ESIGN
High-Accuracy Switched-Capacitor Techniques for Filter and ADC Design
P J Q
ATRICK OHN UINN
Cover design:
different capacitor implementations are shown for various SC circuits; background is a SEM
image of the cross-section of a high-density metal filament capacitor in 65nm CMOS.
©
Patrick John Quinn: 2006
All rights reserved.
Reproduction in whole or in part is prohibited
without the written consent of the copyright owner.
Printing: Printservice TU/e
H -A S -C T
IGH CCURACY WITCHED APACITOR ECHNIQUES
A T F A ADC D
PPLIED O ILTER ND ESIGN
High-Accuracy Switched-Capacitor Techniques for Filter and ADC Design
PROEFSCHRIFT
ter verkrijging van de graad van doctor
aan de Technische Universiteit Eindhoven, op gezag van de
Rector Magnificus, prof.dr.ir. C.J. van Duijn, voor een
commissie aangewezen door het College voor
Promoties in het openbaar te verdedigen
op woensdag 13 september 2006 om 16.00 uur
door
Patrick John Quinn
geboren te Dublin, Ierland
Dit proefschrift is goedgekeurd door de promotor:
prof.dr.ir. A.H.M. van Roermund
Samenstelling promotiecommissie:
prof.dr.ir. J.H. Blom (Voorzitter)
prof.dr.ir. A.H.M. van Roermund (Promotor)
prof. ir. A.J.M. van Tuijl (UT)
prof.dr.ir. G.C.M. Meijer (TUD)
prof.dr.ir. P.G.M. Baltus
prof.dr.ir. J.W.M. Bergmans
prof.dr.ir. R.H.J.M. Otten
dr.ir. J.A. Hegt
CIP-DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN
Quinn, Patrick J.
High-accuracy switched-capacitor techniques applied to filter and ADC design /
by Patrick John Quinn. – Eindhoven : Technische Universiteit Eindhoven, 2006.
Proefschrift. – ISBN-10: 90-386-1813-1
ISBN-13: 978-90-386-1813-5
NUR 959
Trefw.: geschakelde capaciteiten / elektronische filters / analoog-digitale conversie / CMOS-
schakelingen.
Subject headings: switched capacitor filters / analogue-digital conversion / CMOS integrated
circuits /mixed analogue-digital integrated circuits.

To Orla, Siobhán, and my parents

A
BSTRACT
Abstract
In this thesis, innovative techniques are proposed as alternatives to traditional switched-
capacitor (SC) charge-transfer techniques for the more accurate creation of key functions such
as required for analogue signal conditioning and data conversion. Active charge transport with
the help of an amplifier is replaced by passive (delta) charge redistribution with reduced
dependency on capacitor mismatch and with the amplifier used predominantly for buffering.
Orthogonal hardware modulation is used in conjunction with N-path filtering, thus achieving
very high accuracy, while preventing the problem of pattern noise. A floating-hold buffer is
proposed which enables accurate addition of signal voltages without requiring precisely
matching and linear components. The new methods have been applied to the design of CMOS
SC bandpass filters and algorithmic ADC stages (both cyclic and pipelined). The intrinsic
accuracies achieved go beyond those achieved with previous state-of-the-art solutions with a
consequent reduction in power for the same speed applications.
x Abstract