Analysis and design of an optimally coupled 5-GHz quadrature LC oscillator

Johan Van Der Tang; Pepijn Van De Ven; Dieter Kasperkovitz; Arthur Van Roermund

doi:10.1109/4.997861

Analysis and design of an optimally coupled 5-GHz quadrature LC oscillator

Johan Van Der Tang, Pepijn Van De Ven, Dieter Kasperkovitz, Arthur Van Roermund

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

Abstract

A 5-GHz quadrature LC oscillator has been realized, in which the two LC stages are coupled with phase shifters. Analysis on the behavioral level shows that an N-stage LC oscillator is optimally coupled when each stage is connected with phase shifters providing ±180°/N phase shift. Simulation of the 5-GHz two-stage quadrature LC oscillator reveals a 4.3-dB reduction in phase noise compared to a quadrature LC oscillator without phase shifters. Measurements of the 5-GHz quadrature LC oscillator, made in a 30-GHz f _T process, show a phase noise lower than -113 dBc/Hz, with a resonator quality factor of only 4 and an oscillator core power dissipation of 21.2 mW.

Original language	English
Pages (from-to)	657-661
Number of pages	5
Journal	IEEE Journal of Solid-State Circuits
Volume	37
Issue number	5
DOIs	https://doi.org/10.1109/4.997861
Publication status	Published - May 2002
Externally published	Yes

Keywords

Analog integrated circuits
LC oscillators
Modeling
Optimization
Phase noise
Quadrature generation

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10.1109/4.997861

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title = "Analysis and design of an optimally coupled 5-GHz quadrature LC oscillator",

abstract = "A 5-GHz quadrature LC oscillator has been realized, in which the two LC stages are coupled with phase shifters. Analysis on the behavioral level shows that an N-stage LC oscillator is optimally coupled when each stage is connected with phase shifters providing ±180°/N phase shift. Simulation of the 5-GHz two-stage quadrature LC oscillator reveals a 4.3-dB reduction in phase noise compared to a quadrature LC oscillator without phase shifters. Measurements of the 5-GHz quadrature LC oscillator, made in a 30-GHz f T process, show a phase noise lower than -113 dBc/Hz, with a resonator quality factor of only 4 and an oscillator core power dissipation of 21.2 mW.",

keywords = "Analog integrated circuits, LC oscillators, Modeling, Optimization, Phase noise, Quadrature generation",

author = "{Van Der Tang}, Johan and {Van De Ven}, Pepijn and Dieter Kasperkovitz and {Van Roermund}, Arthur",

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AU - Van Der Tang, Johan

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AU - Kasperkovitz, Dieter

AU - Van Roermund, Arthur

PY - 2002/5

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N2 - A 5-GHz quadrature LC oscillator has been realized, in which the two LC stages are coupled with phase shifters. Analysis on the behavioral level shows that an N-stage LC oscillator is optimally coupled when each stage is connected with phase shifters providing ±180°/N phase shift. Simulation of the 5-GHz two-stage quadrature LC oscillator reveals a 4.3-dB reduction in phase noise compared to a quadrature LC oscillator without phase shifters. Measurements of the 5-GHz quadrature LC oscillator, made in a 30-GHz f T process, show a phase noise lower than -113 dBc/Hz, with a resonator quality factor of only 4 and an oscillator core power dissipation of 21.2 mW.

AB - A 5-GHz quadrature LC oscillator has been realized, in which the two LC stages are coupled with phase shifters. Analysis on the behavioral level shows that an N-stage LC oscillator is optimally coupled when each stage is connected with phase shifters providing ±180°/N phase shift. Simulation of the 5-GHz two-stage quadrature LC oscillator reveals a 4.3-dB reduction in phase noise compared to a quadrature LC oscillator without phase shifters. Measurements of the 5-GHz quadrature LC oscillator, made in a 30-GHz f T process, show a phase noise lower than -113 dBc/Hz, with a resonator quality factor of only 4 and an oscillator core power dissipation of 21.2 mW.

KW - Analog integrated circuits

KW - LC oscillators

KW - Modeling

KW - Optimization

KW - Phase noise

KW - Quadrature generation

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Analysis and design of an optimally coupled 5-GHz quadrature LC oscillator

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