5-GHz low-phase noise CMOS quadrature VCO

Chan Young Jeong, Changsik Yoo

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

A 5-GHz low-phase noise CMOS quadrature voltage controlled oscillator (QVCO) is described. Two differential pairs (one for negative gm generation and the other one for the coupling input) of each resonator have separate biasing transistors which are switched on and off by the coupling input of each resonator. The proposed QVCO implemented in a 0.13-μm CMOS technology shows 17-dB phase noise improvement from a conventional QVCO with constant tail current sources while the two QVCOs consume the same power of 5.28 mW. The phase noise of the proposed QVCO is measured to be -102 dBc/Hz and -117 dBc/Hz at 100 KHz and 1-MHz offset, respectively.

Original languageEnglish
Article number1717519
Pages (from-to)609-611
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume16
Issue number11
DOIs
StatePublished - 2006 Nov 1

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Variable frequency oscillators
Phase noise
Resonators
Transistors

Keywords

  • 1/f noise
  • CMOS
  • Phase noise
  • Quadrature voltage controlled oscillator (QVCO)

Cite this

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5-GHz low-phase noise CMOS quadrature VCO. / Jeong, Chan Young; Yoo, Changsik.

In: IEEE Microwave and Wireless Components Letters, Vol. 16, No. 11, 1717519, 01.11.2006, p. 609-611.

Research output: Contribution to journalArticle

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AU - Yoo, Changsik

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AB - A 5-GHz low-phase noise CMOS quadrature voltage controlled oscillator (QVCO) is described. Two differential pairs (one for negative gm generation and the other one for the coupling input) of each resonator have separate biasing transistors which are switched on and off by the coupling input of each resonator. The proposed QVCO implemented in a 0.13-μm CMOS technology shows 17-dB phase noise improvement from a conventional QVCO with constant tail current sources while the two QVCOs consume the same power of 5.28 mW. The phase noise of the proposed QVCO is measured to be -102 dBc/Hz and -117 dBc/Hz at 100 KHz and 1-MHz offset, respectively.

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