대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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CMOS 인버터를 갖는 WCDMA(UMTS)용 다중출력 VC-TCXO

Multi-output VC-TCXO having CMOS inverter for WCDMA(UMTS)

  • 정찬용 (삼성전기 Mobile RF 연구그룹) ;
  • 이해영 (아주대학교 전자공학부)
  • Jeong Chan-Yong (Mobile RF R&D Group, Samsung Electro-Mechanics Co., Ltd.) ;
  • Lee Hai-Young (Department of Electrical Engineering, Ajou University)
  • 발행 : 2006.08.01
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초록

최근 이동통신 시스템의 급속한 발전에 따라, 관련된 이동통신 부품의 개발이 요구되고 있으며, 특히 기존의 이동통신 부품 소형화와 병행하여, 주변회로 및 소자와의 복합화가 진행되고 있다. 본 논문에서는 WCDMA(UMTS)용 다중출력 VC-TCXO (Voltage Controlled-Temperature Compensated Crystal Oscillator)는 내부에 CMOS 인버터를 추가로 내장하여 기본적인 정현파(Clipped sinewave) 출력에 추가로 CMOS 출력을 가능하게 하였고, 또한 WCDMA 시스템에서 요구하는 VC-TCXO 특성을 만족하였다. 또한 기준 발진기의 중요한 특성인 위상잡음(Phase noise) 특성 및 주파수 단기 안정도 특성(Frequency short term stability)도 WCDMA(UMTS)의 기준을 만족하였다. 본 논문에서는 기준 주파수로 26MHz를 사용하고 있지만, 10MHz에서 40MHz까지 다양하게 응용될 수 있다.

Recently, according to the rapid development of mobile system, the development of relative mobile components has been required, and especially, with the miniaturization of mobile component, the complex with nearby components has been progressed. In this paper, multi-output VC-TCXO (Voltage Controlled-Temperature Compensated Crystal Oscillator) for WCDMA integrates the additional CMOS inverter, so it can be the normal clipped sinewave output and additional CMOS output, and also it can be satisfied the VC-TCXO's requirements for WCDMA system. And the important characteristics of reference oscillator, like phase noise and frequency short term stability, are satisfied with WCDMA(UMTS) system's requirement In this paper, however, 25MHz is used for reference frequency, similarly and practically, we think that it can be used from 10MHz to 40MHz.

키워드

참고문헌

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