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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.
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author
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
2014-10-23 11:17:22
date last changed
2017-03-19 03:59:43
@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},
  keyword      = {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},
  volume       = {80},
  year         = {2014},
}