Linearity of bulk-controlled inverter ring VCO in weak and strong inversion

Publication: Research - peer-reviewJournal article – Annual report year: 2007

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Linearity of bulk-controlled inverter ring VCO in weak and strong inversion. / Wismar, Ulrik Sørensen; Wisland, D.; Andreani, Pietro.

In: Analog Integrated Circuits and Signal Processing, Vol. 50, No. 1, 2007, p. 59-67.

Publication: Research - peer-reviewJournal article – Annual report year: 2007

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Author

Wismar, Ulrik Sørensen; Wisland, D.; Andreani, Pietro / Linearity of bulk-controlled inverter ring VCO in weak and strong inversion.

In: Analog Integrated Circuits and Signal Processing, Vol. 50, No. 1, 2007, p. 59-67.

Publication: Research - peer-reviewJournal article – Annual report year: 2007

Bibtex

@article{4d7d4dd3a8f544aa910e717ed2dc26ca,
title = "Linearity of bulk-controlled inverter ring VCO in weak and strong inversion",
keywords = "inverter ring, VCO, weak inversion, FDSM, linear modulation",
publisher = "Springer New York LLC",
author = "Wismar, {Ulrik Sørensen} and D. Wisland and Pietro Andreani",
year = "2007",
doi = "10.1007/s10470-006-9370-4",
volume = "50",
number = "1",
pages = "59--67",
journal = "Analog Integrated Circuits and Signal Processing",
issn = "0925-1030",

}

RIS

TY - JOUR

T1 - Linearity of bulk-controlled inverter ring VCO in weak and strong inversion

A1 - Wismar,Ulrik Sørensen

A1 - Wisland,D.

A1 - Andreani,Pietro

AU - Wismar,Ulrik Sørensen

AU - Wisland,D.

AU - Andreani,Pietro

PB - Springer New York LLC

PY - 2007

Y1 - 2007

N2 - In this paper linearity of frequency modulation in voltage controlled inverter ring oscillators for non feedback sigma delta converter applications is studied. The linearity is studied through theoretical models of the oscillator operating at supply voltages above and below the threshold voltage of a transistor, bringing the transistors in respectively strong and weak inversion. The theoretical results are tested with more advanced models through spectreRF simulations. A soft rail approach implemented to improve linearity in weak inversion is proposed and demonstrated. The influence from voltage noise, process variations and temperature variations have also been simulated to indicate the advantages of having the soft rail bias transistor in the VCO.

AB - In this paper linearity of frequency modulation in voltage controlled inverter ring oscillators for non feedback sigma delta converter applications is studied. The linearity is studied through theoretical models of the oscillator operating at supply voltages above and below the threshold voltage of a transistor, bringing the transistors in respectively strong and weak inversion. The theoretical results are tested with more advanced models through spectreRF simulations. A soft rail approach implemented to improve linearity in weak inversion is proposed and demonstrated. The influence from voltage noise, process variations and temperature variations have also been simulated to indicate the advantages of having the soft rail bias transistor in the VCO.

KW - inverter ring

KW - VCO

KW - weak inversion

KW - FDSM

KW - linear modulation

U2 - 10.1007/s10470-006-9370-4

DO - 10.1007/s10470-006-9370-4

JO - Analog Integrated Circuits and Signal Processing

JF - Analog Integrated Circuits and Signal Processing

SN - 0925-1030

IS - 1

VL - 50

SP - 59

EP - 67

ER -