VCO with Miller theorem-based varactors

H. C. Chen; H. W. Chiu

doi:10.1049/el.2010.1014

VCO with Miller theorem-based varactors

H. C. Chen
, H. W. Chiu

Department of Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

An inductor-capacitor voltage controlled oscillator (LC VCO) using Miller theorem-based varactors is presented in 90nm CMOS technology for low-voltage applications. The VCO tuning range is effectively enhanced by incorporating a capacitive shunt-shunt feedback amplifier. Dissipating 3mW from a 0.7V supply, the VCO exhibits a phase noise of -111dBc/Hz at 1MHz offset from the oscillation frequency of 10.4GHz. The frequency tuning range in percentage is 9.7 for a controlled voltage range of 0.1-0.5V. The VCO achieves a high K_VCO of 2.5GHz/V and a fair FoM of -186.6dBc/Hz.

Original language	English
Pages (from-to)	990-991
Number of pages	2
Journal	Electronics Letters
Volume	46
Issue number	14
DOIs	https://doi.org/10.1049/el.2010.1014
State	Published - 8 Jul 2010

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10.1049/el.2010.1014

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AB - An inductor-capacitor voltage controlled oscillator (LC VCO) using Miller theorem-based varactors is presented in 90nm CMOS technology for low-voltage applications. The VCO tuning range is effectively enhanced by incorporating a capacitive shunt-shunt feedback amplifier. Dissipating 3mW from a 0.7V supply, the VCO exhibits a phase noise of -111dBc/Hz at 1MHz offset from the oscillation frequency of 10.4GHz. The frequency tuning range in percentage is 9.7 for a controlled voltage range of 0.1-0.5V. The VCO achieves a high KVCO of 2.5GHz/V and a fair FoM of -186.6dBc/Hz.

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VCO with Miller theorem-based varactors

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