A Multibit Dual-Feedback CT \Delta\Sigma Modulator With Lowpass Signal Transfer Function
This paper presents a dual-feedback continuous-time delta-sigma modulator that features a signal transfer function with low sensitivity to coefficient variations. The anti-aliasing of this topology is similar to that of the feedback architecture while using only two feedback paths for modulators of...
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Published in | IEEE transactions on circuits and systems. I, Regular papers Vol. 58; no. 9; pp. 2083 - 2095 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
IEEE
01.09.2011
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Subjects | |
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Abstract | This paper presents a dual-feedback continuous-time delta-sigma modulator that features a signal transfer function with low sensitivity to coefficient variations. The anti-aliasing of this topology is similar to that of the feedback architecture while using only two feedback paths for modulators of any order. The proposed architecture is a good candidate for low-power applications as it shows relaxed amplifier gain-bandwidth requirements for the first integrator. As a proof of concept, a third-order delta-sigma modulator has been implemented and tested which achieves 76 dB dynamic range over 5 MHz signal bandwidth while consuming 6 mW from a 1.2 V supply. The prototype chip, fabricated in a 130 nm CMOS process, provides 70 dB anti-aliasing with no out-of-band peaking in the signal transfer function. |
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AbstractList | This paper presents a dual-feedback continuous-time delta-sigma modulator that features a signal transfer function with low sensitivity to coefficient variations. The anti-aliasing of this topology is similar to that of the feedback architecture while using only two feedback paths for modulators of any order. The proposed architecture is a good candidate for low-power applications as it shows relaxed amplifier gain-bandwidth requirements for the first integrator. As a proof of concept, a third-order delta-sigma modulator has been implemented and tested which achieves 76 dB dynamic range over 5 MHz signal bandwidth while consuming 6 mW from a 1.2 V supply. The prototype chip, fabricated in a 130 nm CMOS process, provides 70 dB anti-aliasing with no out-of-band peaking in the signal transfer function. |
Author | Ranjbar, M. Oliaei, O. |
Author_xml | – sequence: 1 givenname: M. surname: Ranjbar fullname: Ranjbar, M. email: mranjbar@ecs.umass.edu organization: Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Amherst, MA, USA – sequence: 2 givenname: O. surname: Oliaei fullname: Oliaei, O. organization: Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Amherst, MA, USA |
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CitedBy_id | crossref_primary_10_1109_TVLSI_2014_2303815 crossref_primary_10_1007_s10470_014_0335_8 crossref_primary_10_1007_s10470_015_0590_3 crossref_primary_10_1109_JSSC_2014_2319254 crossref_primary_10_1109_TCSI_2012_2230585 crossref_primary_10_1109_TCSI_2018_2871275 crossref_primary_10_1109_TCSI_2023_3299955 crossref_primary_10_1007_s10470_013_0114_y crossref_primary_10_1109_TIM_2013_2273597 crossref_primary_10_1007_s10470_015_0511_5 crossref_primary_10_1007_s10470_021_01866_3 crossref_primary_10_1109_JSSC_2016_2532345 |
Cites_doi | 10.1109/TCSI.2004.829234 10.1109/JSSC.2006.884332 10.1109/EDTC.1997.582328 10.1109/82.242348 10.1109/TCOM.1985.1096276 10.1049/el:20051456 10.1109/82.476173 10.1109/JSSC.2004.836248 10.1049/el:20010542 10.1109/JSSC.2010.2042244 10.1049/el:20072331 10.1109/81.948432 10.1109/82.598424 10.1109/AMICD.1996.569388 10.1109/JSSC.2009.2028053 10.1109/JSSC.2003.820856 10.1109/JSSC.2007.903086 10.1109/TCSI.2004.836852 10.1109/JSSC.2010.2046230 10.1109/82.769775 10.1109/TCSI.2008.925362 10.1109/TCSI.2005.860116 10.1109/TCSII.2003.814806 10.1109/TCSI.2007.906070 10.1109/82.755409 |
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References | ref35 ref13 ref34 ref15 ref30 ref10 ref2 ref1 munoz (ref16) 2005 ref17 ref19 ref18 breems (ref14) 2001 ranjbar (ref11) 0 (ref24) 2005 ref23 norsworthy (ref12) 1997 ke (ref5) 2010 ref20 ref22 ref21 breems (ref32) 0 ranjbar (ref26) 0 ref28 ref27 ref29 ref8 ref7 baird (ref33) 1995; 42 ref9 ref4 ogata (ref25) 1997 ref3 ref6 allen (ref31) 2002 |
References_xml | – ident: ref30 doi: 10.1109/TCSI.2004.829234 – ident: ref1 doi: 10.1109/JSSC.2006.884332 – start-page: 1878 year: 0 ident: ref26 article-title: Continuous-time feed-forward <formula formulatype="inline"> <tex Notation="TeX">$\Delta\Sigma$</tex></formula> modulators with robust signal transfer function publication-title: Proc IEEE Int Symp Circuits and Syst (ISCAS) contributor: fullname: ranjbar – ident: ref19 doi: 10.1109/EDTC.1997.582328 – ident: ref23 doi: 10.1109/82.242348 – ident: ref17 doi: 10.1109/TCOM.1985.1096276 – ident: ref22 doi: 10.1049/el:20051456 – volume: 42 start-page: 753 year: 1995 ident: ref33 article-title: Linearity enhancement of multibit <formula formulatype="inline"><tex Notation="TeX">$\Delta\Sigma$</tex></formula> A/D and D/A converters using data weighted averaging publication-title: IEEE Trans Circuits Syst II Analog Digit Signal Process doi: 10.1109/82.476173 contributor: fullname: baird – ident: ref9 doi: 10.1109/JSSC.2004.836248 – year: 2002 ident: ref31 publication-title: CMOS Analog Circuit Design contributor: fullname: allen – ident: ref15 doi: 10.1049/el:20010542 – year: 1997 ident: ref12 publication-title: Delta-Sigma Data Converters Theory Design and Simulation contributor: fullname: norsworthy – start-page: 500 year: 2005 ident: ref16 article-title: A 4.7 mW 89.5 dB DR CT complex sigma delta ADC with built-in LPF publication-title: ISSCC Dig Tech Papers contributor: fullname: munoz – year: 2005 ident: ref24 publication-title: The MathWorks – start-page: 5 year: 0 ident: ref11 article-title: A robust STF 6 mW CT delta-sigma modulator with 76 dB dynamic range and 5 MHz bandwidth publication-title: Proc IEEE Custom Integr Circuits Conf (CICC) 2010 contributor: fullname: ranjbar – start-page: 318 year: 0 ident: ref32 article-title: Design for optimum performance-to-power ratio of a continuous-time <formula formulatype="inline"><tex Notation="TeX">$\Sigma\Delta$</tex></formula> modulator publication-title: Proc 1999 Eur Solid State Circuits Conf (ESSCIRC'99) contributor: fullname: breems – ident: ref4 doi: 10.1109/JSSC.2010.2042244 – ident: ref10 doi: 10.1049/el:20072331 – ident: ref29 doi: 10.1109/81.948432 – ident: ref7 doi: 10.1109/82.598424 – year: 2001 ident: ref14 publication-title: Continuous-Time Sigma– Delta Modulation for A/D Conversion in Radio Receivers contributor: fullname: breems – ident: ref34 doi: 10.1109/AMICD.1996.569388 – start-page: 153 year: 2010 ident: ref5 article-title: A 2.8-to-8.5 mW GSM/bluetooth/UMTS/DVB-H/WLAN fully reconfigurable CT <formula formulatype="inline"><tex Notation="TeX">$\Delta\Sigma$</tex> </formula> with 200 kHz to 20 MHz BW for 4G radios in 90 nm digital CMOS publication-title: Proc IEEE Symp VLSI Circuits contributor: fullname: ke – ident: ref3 doi: 10.1109/JSSC.2009.2028053 – ident: ref8 doi: 10.1109/JSSC.2003.820856 – ident: ref2 doi: 10.1109/JSSC.2007.903086 – ident: ref27 doi: 10.1109/TCSI.2004.836852 – ident: ref6 doi: 10.1109/JSSC.2010.2046230 – ident: ref35 doi: 10.1109/82.769775 – ident: ref28 doi: 10.1109/TCSI.2008.925362 – ident: ref20 doi: 10.1109/TCSI.2005.860116 – year: 1997 ident: ref25 publication-title: Discrete-Time Control Systems contributor: fullname: ogata – ident: ref21 doi: 10.1109/TCSII.2003.814806 – ident: ref18 doi: 10.1109/TCSI.2007.906070 – ident: ref13 doi: 10.1109/82.755409 |
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SubjectTerms | Analog to digital converter anti-aliasing continuous-time delta-sigma modulation Equations Feedforward neural networks Frequency modulation Gain low-pass filter Topology Transfer functions |
Title | A Multibit Dual-Feedback CT \Delta\Sigma Modulator With Lowpass Signal Transfer Function |
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