전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제59권2호
  • /
  • Pages.471-475
  • /
  • 2010
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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저전압 능동 인덕터 VCO를 이용한 주파수 합성기

A Frequency Synthesizer using Low Voltage Active Inductor VCO

  • 이순재 (전북대학 전자정보공학부) ;
  • 이동건 (전북대학 전자정보공학부) ;
  • 정항근 (전북대학 전자정보공학부)
  • 발행 : 2010.02.01
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초록

This paper presents a frequency synthesizer using low voltage active inductor VCO(Voltage Controlled Oscillator). The low voltage active inductor VCO with feedback resistor increases its equivalent inductance and the quality-factor(Q). Under certain conditions, the low voltage active inductor with feedback resistor generates a negative resistance at the input. In this paper, the conditions for negative resistance are obtained by small signal analysis. The designed low voltage active inductor VCO covers a frequency band between 1059MHz and 1223MHz. The measured phase noise at 1.178GHz is -81.8dBc/Hz at 1MHz offset.

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참고문헌

  1. Grzegorz Szczepkowski, Gerard Baldwin, and Ronan Farrell, "Wideband 0.18um CMOS VCO using active inductor with negative resistance," Proceeding of ECCTD, pp. 990-993, Aug. 2007.
  2. Francesco Svelto, and Rinaldo Castello, "A bond-wire inductor MOS varactor VCO tunable from 1.8 to 2.4 GHz," IEEE Transactions on Micorwave Theory and Technique, vol. 50, pp. 403-410, Jan. 2002. https://doi.org/10.1109/22.981292
  3. L. Dai and R. Harjani, "Design of low-phase-noise CMOS ring oscillator," IEEE Trans. Circuit Syst.II, vol. 49, no. 5, pp.328-338, May 2002. https://doi.org/10.1109/TCSII.2002.801409
  4. S. Hara, T. Tokumitsu, T. Tanaka, and M. Aikawa, "Broad-band monolithic microwave active inductor and its application to miniaturized wide-band amplifier amplifier," IEEE Trans. Microwave Theory Tech., vol. 36, pp.1920-1924, Dec. 1988. https://doi.org/10.1109/22.17434
  5. 유태근, 홍석용, 정항근, "A low-voltage active CMOS inductor with high quality factor," 대한전자공학회 SD편, vol. 45, pp. 125-129, Feb. 2009.
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