A 12MHz Switched-Capacitor Relaxation Oscillator with a Nearly Minimal FoM of -161dBc/Hz

P.F.J. Geraedts; Adrianus Johannes Maria van Tuijl; Eric A.M. Klumperink; Gerhardus J.M. Wienk; Bram Nauta

A 12MHz Switched-Capacitor Relaxation Oscillator with a Nearly Minimal FoM of -161dBc/Hz

P.F.J. Geraedts, Adrianus Johannes Maria van Tuijl, Eric A.M. Klumperink, Gerhardus J.M. Wienk, Bram Nauta

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

In this work the phase noise performance of relaxation oscillators has been analyzed resulting in simple though precise phase noise expressions. These expressions have lead to a new relaxation oscillator topology, which exploits a noise filtering technique implemented with a switched-capacitor circuit to minimize phase noise. Measurements on a 65nm CMOS design show a sawtooth waveform, a frequency tuning range between 1 and 12MHz and a rather constant frequency tuning gain. At 12MHz oscillation frequency it consumes 90μW while the phase noise is -109dBc/Hz at 100KHz offset frequency. By minimizing and balancing noise contributions of charge and discharge mechanisms, a nearly minimal FoM of -161dBc/Hz has been achieved, which is a 6dB improvement over state-of-the-art.

Original language	Undefined
Title of host publication	Proceedings of the 19th Annual Workshop on Circuits
Place of Publication	Veldhoven
Publisher	STW
Pages	175-178
Number of pages	4
ISBN (Print)	978-90-73461-56-7
Publication status	Published - 29 Nov 2008
Event	19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008 - Veldhoven, Netherlands Duration: 27 Nov 2008 → 28 Nov 2008 Conference number: 19

Publication series

Name
Publisher	Technology Foundation STW
Number	412

Conference

Conference	19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008
Country/Territory	Netherlands
City	Veldhoven
Period	27/11/08 → 28/11/08

Keywords

EWI-14988
METIS-255471
IR-65353

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Cite this

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title = "A 12MHz Switched-Capacitor Relaxation Oscillator with a Nearly Minimal FoM of -161dBc/Hz",

abstract = "In this work the phase noise performance of relaxation oscillators has been analyzed resulting in simple though precise phase noise expressions. These expressions have lead to a new relaxation oscillator topology, which exploits a noise filtering technique implemented with a switched-capacitor circuit to minimize phase noise. Measurements on a 65nm CMOS design show a sawtooth waveform, a frequency tuning range between 1 and 12MHz and a rather constant frequency tuning gain. At 12MHz oscillation frequency it consumes 90μW while the phase noise is -109dBc/Hz at 100KHz offset frequency. By minimizing and balancing noise contributions of charge and discharge mechanisms, a nearly minimal FoM of -161dBc/Hz has been achieved, which is a 6dB improvement over state-of-the-art.",

keywords = "EWI-14988, METIS-255471, IR-65353",

author = "P.F.J. Geraedts and {van Tuijl}, {Adrianus Johannes Maria} and Klumperink, {Eric A.M.} and Wienk, {Gerhardus J.M.} and Bram Nauta",

year = "2008",

month = nov,

day = "29",

language = "Undefined",

isbn = "978-90-73461-56-7",

publisher = "STW",

number = "412",

pages = "175--178",

booktitle = "Proceedings of the 19th Annual Workshop on Circuits",

note = "19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008 ; Conference date: 27-11-2008 Through 28-11-2008",

}

A 12MHz Switched-Capacitor Relaxation Oscillator with a Nearly Minimal FoM of -161dBc/Hz. / Geraedts, P.F.J.; van Tuijl, Adrianus Johannes Maria; Klumperink, Eric A.M. et al.
Proceedings of the 19th Annual Workshop on Circuits. Veldhoven: STW, 2008. p. 175-178.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - A 12MHz Switched-Capacitor Relaxation Oscillator with a Nearly Minimal FoM of -161dBc/Hz

AU - Geraedts, P.F.J.

AU - van Tuijl, Adrianus Johannes Maria

AU - Klumperink, Eric A.M.

AU - Wienk, Gerhardus J.M.

AU - Nauta, Bram

N1 - Conference code: 19

PY - 2008/11/29

Y1 - 2008/11/29

N2 - In this work the phase noise performance of relaxation oscillators has been analyzed resulting in simple though precise phase noise expressions. These expressions have lead to a new relaxation oscillator topology, which exploits a noise filtering technique implemented with a switched-capacitor circuit to minimize phase noise. Measurements on a 65nm CMOS design show a sawtooth waveform, a frequency tuning range between 1 and 12MHz and a rather constant frequency tuning gain. At 12MHz oscillation frequency it consumes 90μW while the phase noise is -109dBc/Hz at 100KHz offset frequency. By minimizing and balancing noise contributions of charge and discharge mechanisms, a nearly minimal FoM of -161dBc/Hz has been achieved, which is a 6dB improvement over state-of-the-art.

AB - In this work the phase noise performance of relaxation oscillators has been analyzed resulting in simple though precise phase noise expressions. These expressions have lead to a new relaxation oscillator topology, which exploits a noise filtering technique implemented with a switched-capacitor circuit to minimize phase noise. Measurements on a 65nm CMOS design show a sawtooth waveform, a frequency tuning range between 1 and 12MHz and a rather constant frequency tuning gain. At 12MHz oscillation frequency it consumes 90μW while the phase noise is -109dBc/Hz at 100KHz offset frequency. By minimizing and balancing noise contributions of charge and discharge mechanisms, a nearly minimal FoM of -161dBc/Hz has been achieved, which is a 6dB improvement over state-of-the-art.

KW - EWI-14988

KW - METIS-255471

KW - IR-65353

M3 - Conference contribution

SN - 978-90-73461-56-7

SP - 175

EP - 178

BT - Proceedings of the 19th Annual Workshop on Circuits

PB - STW

CY - Veldhoven

T2 - 19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008

Y2 - 27 November 2008 through 28 November 2008

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