Experimental Evaluation of Wide Range Injection Locking in a CMOS RC Oscillator

Eduardo Ortigueira; Luís Augusto Bica Gomes de Oliveira; Jorge R. Fernandes; Manuel de Medeiros Silva

doi:10.1109/ISCAS.2014.6865231

Experimental Evaluation of Wide Range Injection Locking in a CMOS RC Oscillator

Eduardo Ortigueira, Luís Augusto Bica Gomes de Oliveira, Jorge R. Fernandes, Manuel de Medeiros Silva

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

Abstract

CMOS RC oscillators have low area, can be built with a low cost technology, and have a wide tuning range, but they have higher phase-noise than LC oscillators. This can be overcome by synchronizing the oscillator by injection-locking with an low phase-noise external source. We present here an experimental study of injection-locking in an RC two-integrator oscillator. First and second harmonic injection in different locations of the oscillator are investigated. A test circuit was fabricated using a standard CMOS technology with 1.2 V supply. Measurement results show that a phase noise improvement of more than 30 dB, can be obtained with only -30 dBm injected signal between 100 kHz and 10 MHz frequency offset over a wide frequency range (600 MHz to 3 GHz).

Original language	English
Title of host publication	Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Pages	698-701
DOIs	https://doi.org/10.1109/ISCAS.2014.6865231
Publication status	Published - 2014
Event	IEEE Int. Symp. Circuits and Systems (ISCAS’14) - Duration: 1 Jan 2014 → …

Conference

Conference	IEEE Int. Symp. Circuits and Systems (ISCAS’14)
Period	1/01/14 → …

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10.1109/ISCAS.2014.6865231

Cite this

@inproceedings{ae95a513a0a54ad7b7981f83b35d3b4a,

title = "Experimental Evaluation of Wide Range Injection Locking in a CMOS RC Oscillator",

abstract = "CMOS RC oscillators have low area, can be built with a low cost technology, and have a wide tuning range, but they have higher phase-noise than LC oscillators. This can be overcome by synchronizing the oscillator by injection-locking with an low phase-noise external source. We present here an experimental study of injection-locking in an RC two-integrator oscillator. First and second harmonic injection in different locations of the oscillator are investigated. A test circuit was fabricated using a standard CMOS technology with 1.2 V supply. Measurement results show that a phase noise improvement of more than 30 dB, can be obtained with only -30 dBm injected signal between 100 kHz and 10 MHz frequency offset over a wide frequency range (600 MHz to 3 GHz).",

keywords = "Injection lock, Oscillator, CMOS",

author = "Eduardo Ortigueira and Oliveira, {Lu{\'i}s Augusto Bica Gomes de} and Fernandes, {Jorge R.} and Silva, {Manuel de Medeiros}",

note = "This work was supported by national funds through FCT Fundacao para a Ciencia e a Tecnologia, under projects PEst-OE/EEI/LA0021/2013, PTDC/CTMNAN/112672/2009 (SCOMagNO), and PhD Grant SFRH/BD/84507/2012.; IEEE Int. Symp. Circuits and Systems (ISCAS{\textquoteright}14) ; Conference date: 01-01-2014",

year = "2014",

doi = "10.1109/ISCAS.2014.6865231",

language = "English",

isbn = "978-1-4799-3431-7",

pages = "698--701",

booktitle = "Circuits and Systems (ISCAS), 2014 IEEE International Symposium on",

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TY - GEN

T1 - Experimental Evaluation of Wide Range Injection Locking in a CMOS RC Oscillator

AU - Ortigueira, Eduardo

AU - Oliveira, Luís Augusto Bica Gomes de

AU - Fernandes, Jorge R.

AU - Silva, Manuel de Medeiros

N1 - This work was supported by national funds through FCT Fundacao para a Ciencia e a Tecnologia, under projects PEst-OE/EEI/LA0021/2013, PTDC/CTMNAN/112672/2009 (SCOMagNO), and PhD Grant SFRH/BD/84507/2012.

PY - 2014

Y1 - 2014

N2 - CMOS RC oscillators have low area, can be built with a low cost technology, and have a wide tuning range, but they have higher phase-noise than LC oscillators. This can be overcome by synchronizing the oscillator by injection-locking with an low phase-noise external source. We present here an experimental study of injection-locking in an RC two-integrator oscillator. First and second harmonic injection in different locations of the oscillator are investigated. A test circuit was fabricated using a standard CMOS technology with 1.2 V supply. Measurement results show that a phase noise improvement of more than 30 dB, can be obtained with only -30 dBm injected signal between 100 kHz and 10 MHz frequency offset over a wide frequency range (600 MHz to 3 GHz).

AB - CMOS RC oscillators have low area, can be built with a low cost technology, and have a wide tuning range, but they have higher phase-noise than LC oscillators. This can be overcome by synchronizing the oscillator by injection-locking with an low phase-noise external source. We present here an experimental study of injection-locking in an RC two-integrator oscillator. First and second harmonic injection in different locations of the oscillator are investigated. A test circuit was fabricated using a standard CMOS technology with 1.2 V supply. Measurement results show that a phase noise improvement of more than 30 dB, can be obtained with only -30 dBm injected signal between 100 kHz and 10 MHz frequency offset over a wide frequency range (600 MHz to 3 GHz).

KW - Injection lock

KW - Oscillator

KW - CMOS

U2 - 10.1109/ISCAS.2014.6865231

DO - 10.1109/ISCAS.2014.6865231

M3 - Conference contribution

SN - 978-1-4799-3431-7

SP - 698

EP - 701

BT - Circuits and Systems (ISCAS), 2014 IEEE International Symposium on

T2 - IEEE Int. Symp. Circuits and Systems (ISCAS’14)

Y2 - 1 January 2014

ER -

Experimental Evaluation of Wide Range Injection Locking in a CMOS RC Oscillator

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