Paper Info
Title
Influence Of Excess Loop Delay On The Stf Of Continuous-Time Delta-Sigma Modulators
Abstract
This paper analyzes the effect of signal transfer function (STF) peaking in continuous-time (CT) Delta-Sigma-Modulators (DSMs) arising from excess loop delay (ELD) and its compensation. Starting from a generic model, the origin of different contributors to STF peaking are revised, namely noise transfer function (NTF) peaking due to aggressive noise shaping, instability from uncompensated delay as well as forward loop filter zeros in cascade-of-integrators with distributed feed-forward (CIFF) modulators. The shift of forward loop filter zeros as a result of ELD compensation is shown intuitively for a 3rd order example, while system-level simulations of various 2nd, 3rd and 4th order CT single-loop modulators confirm increased STF peaking in the above stated scenarios.
Year
DOI
Venue
2021
10.1109/ISCAS51556.2021.9401460
2021 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
Keywords
DocType
ISSN
delta-sigma modulator, continuous-time, STF, ELD, CIFF
Conference
0271-4302
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Michael Pietzko100.68
Johannes Wagner265449.55
Ahmed Abdelaal311.70
John G. Kauffman4369.06
Maurits Ortmanns5501114.46