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Title of Journal: Analog Integr Circ Sig Process

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Abbravation: Analog Integrated Circuits and Signal Processing

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Springer US

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DOI

10.1007/bf03311141

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ISSN

1573-1979

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A widerange VCO with an automatic frequency ampl

Authors: YoungGun Pu KangYoon Lee
Publish Date: 2009/05/26
Volume: 62, Issue: 1, Pages: 91-
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Abstract

This paper presents a wide tuning range VCO with an automatic frequency amplitude and gain calibration loop To cover the wide tuning range the automatic frequency calibration AFC loop is used In addition to provide the optimum NegativeGm to the LC tank in a wide frequency range the number of active NegativeGm circuits is designed to be switched digitally based on the target frequency Also the VCO gain should be calibrated digitally to compensate for the gain variation The VCO tuning range is 26 GHz from 17 to 43 GHz and the power consumption is 2–4 mA from a 18 V supply The measured VCO phase noise is −120 dBc/Hz at 1 MHz offset

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