Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

A low-power 2nd-order CT delta-sigma modulator with a single operational amplifier

Radjen, Dejan LU ; Anderson, Martin ; Sundstrom, Lars and Andreani, Pietro LU (2014) In Analog Integrated Circuits and Signal Processing 80(3). p.387-397
Abstract
We present a 2nd-order 4-bit continuous-time (CT) delta-sigma modulator (DSM) employing a 2nd-order loop filter with a single operational amplifier. This choice strongly reduces the power consumption, since operational amplifiers are the most power hungry blocks in the DSM. The DSM has been implemented in a 65 nm CMOS process, where it occupies an area of . It achieves an SNDR of 64 dB over a 500 kHz signal bandwidth with an oversampling ratio of 16. The power consumption is from a 800 mV power supply. The DSM figure-of-merit is 59 fJ/conversion. The CT DSM is well suited for the receiver of an ultra-low-power radio.
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Delta-Sigma, Single-operational-amplifier, Low-power, Continuous time, RC loop filter
in
Analog Integrated Circuits and Signal Processing
volume
80
issue
3
pages
387 - 397
publisher
Springer
external identifiers
  • wos:000342079400007
  • scopus:84906948692
ISSN
0925-1030
DOI
10.1007/s10470-014-0335-8
language
English
LU publication?
yes
id
78300094-43d1-4ce1-b235-e91d1f970831 (old id 4706649)
date added to LUP
2016-04-01 15:01:34
date last changed
2022-03-22 03:09:01
@article{78300094-43d1-4ce1-b235-e91d1f970831,
  abstract     = {{We present a 2nd-order 4-bit continuous-time (CT) delta-sigma modulator (DSM) employing a 2nd-order loop filter with a single operational amplifier. This choice strongly reduces the power consumption, since operational amplifiers are the most power hungry blocks in the DSM. The DSM has been implemented in a 65 nm CMOS process, where it occupies an area of . It achieves an SNDR of 64 dB over a 500 kHz signal bandwidth with an oversampling ratio of 16. The power consumption is from a 800 mV power supply. The DSM figure-of-merit is 59 fJ/conversion. The CT DSM is well suited for the receiver of an ultra-low-power radio.}},
  author       = {{Radjen, Dejan and Anderson, Martin and Sundstrom, Lars and Andreani, Pietro}},
  issn         = {{0925-1030}},
  keywords     = {{Delta-Sigma; Single-operational-amplifier; Low-power; Continuous time; RC loop filter}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{387--397}},
  publisher    = {{Springer}},
  series       = {{Analog Integrated Circuits and Signal Processing}},
  title        = {{A low-power 2nd-order CT delta-sigma modulator with a single operational amplifier}},
  url          = {{http://dx.doi.org/10.1007/s10470-014-0335-8}},
  doi          = {{10.1007/s10470-014-0335-8}},
  volume       = {{80}},
  year         = {{2014}},
}