DocumentCode
3025672
Title
Device noise in continuous-time ΔΣ modulators with Switched-Capacitor feedback DACs
Author
Rajan, Radha S. ; Pavan, Shanthi
Author_Institution
Indian Inst. of Technol. - Madras, Chennai, India
fYear
2012
fDate
20-23 May 2012
Firstpage
524
Lastpage
527
Abstract
We analyze in-band thermal noise in continuous-time delta sigma modulators (CTDSMs) with Switched-Capacitor feedback DACs. We show that in such modulators, noise from around multiples of the sampling frequency aliases to in-band frequencies. We give an intuitive understanding of this phenomenon and describe a model that can be used to analyze noise in such modulators. We present the results obtained using state space analysis. Our results compare well with those obtained from a circuit simulator.
Keywords
circuit noise; delta-sigma modulation; feedback; switched capacitor networks; continuous-time ΔΣ modulators; continuous-time delta sigma modulators; device noise; in-band frequencies; in-band thermal noise; sampling frequency aliases; switched-capacitor feedback DAC; Capacitors; Modulation; Noise; Switches; Thermal noise; Thyristors; Transfer functions;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location
Seoul
ISSN
0271-4302
Print_ISBN
978-1-4673-0218-0
Type
conf
DOI
10.1109/ISCAS.2012.6272081
Filename
6272081
Link To Document