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A temperature-compensated low-noise digitally-controlled crystal oscillator for multi-standard applications

This paper presents an integrated 26-MHz digitally-controlled crystal oscillator (DCXO) with temperature compensation function for multi-standard cellular applications, that achieves a phase noise of -154 and -159 dBc/Hz at 10 kHz and 100 kHz offset, respectively. The frequency instability over temp...

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Main Authors:	Ming-Da Tsai, Chih-Wei Yeh, Yi-Hsien Cho, Ling-Wei Ke, Pei-Wei Chen, Guang-Kaai Dehng
Format:	Conference Proceeding
Language:	English
Subjects:	Automatic frequency control Capacitors Circuits CMOS technology Crystal oscillator DCXO digital trimming GSM Multiaccess communication Oscillators Phase noise temperature compensation Temperature sensors Tuning VCTCXO VCXO WCDMA
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creator	Ming-Da Tsai Chih-Wei Yeh Yi-Hsien Cho Ling-Wei Ke Pei-Wei Chen Guang-Kaai Dehng
description	This paper presents an integrated 26-MHz digitally-controlled crystal oscillator (DCXO) with temperature compensation function for multi-standard cellular applications, that achieves a phase noise of -154 and -159 dBc/Hz at 10 kHz and 100 kHz offset, respectively. The frequency instability over temperature is compensated by built-in temperature sensor and compensating capacitor. The frequency instability from -10 to 55 degC is about +/- 1 ppm. The AFC frequency tuning is done by a digitally-controlled metal-oxide-metal capacitor array that is 13-bit thermometer decoded. The DCXO is implemented in a 0.13-mum CMOS technology.
doi_str_mv	10.1109/RFIC.2008.4561493
format	conference_proceeding
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The frequency instability over temperature is compensated by built-in temperature sensor and compensating capacitor. The frequency instability from -10 to 55 degC is about +/- 1 ppm. The AFC frequency tuning is done by a digitally-controlled metal-oxide-metal capacitor array that is 13-bit thermometer decoded. 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ispartof	2008 IEEE Radio Frequency Integrated Circuits Symposium, 2008, p.533-536
issn	1529-2517 2375-0995
language	eng
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Automatic frequency control Capacitors Circuits CMOS technology Crystal oscillator DCXO digital trimming GSM Multiaccess communication Oscillators Phase noise temperature compensation Temperature sensors Tuning VCTCXO VCXO WCDMA
title	A temperature-compensated low-noise digitally-controlled crystal oscillator for multi-standard applications
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