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

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Low Power, Wide Tuning Range VCO with Two-Step Negative-Gm Calibration Loop

2단계 자동 트랜스컨덕턴스 조절 기능을 가진 저전력, 광대역 전압제어 발진기의 설계

  • Kim, Sang-Woo (Department of Electronic Engineering, Konkuk University) ;
  • Park, Joon-Sung (Department of Electronic Engineering, Konkuk University) ;
  • Pu, Young-Gun (Department of Electronic Engineering, Konkuk University) ;
  • Hur, Jeong (Department of Electronic Engineering, Konkuk University) ;
  • Lee, Kang-Yoon (Department of Electronic Engineering, Konkuk University)
  • 김상우 (건국대학교 전자정보통신공학부) ;
  • 박준성 (건국대학교 전자정보통신공학부) ;
  • 부영건 (건국대학교 전자정보통신공학부) ;
  • 허정 (건국대학교 전자정보통신공학부) ;
  • 이강윤 (건국대학교 전자정보통신공학부)
  • Published : 2010.02.25
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Abstract

This paper presents a low-power, wide tuning range VCO with automatic two-step negative-Gm calibration loop to compensate for the process, voltage and temperature variation. To cover the wide tuning range, digital automatic negative-Gm tuning loop and analog automatic amplitude calibration loop are used. Adaptive body biasing (ABB) technique is also adopted to minimize the power consumption by lowering the threshold voltage of transistors in the negative-Gm core. The power consumption is 2 mA to 6mA from a 1.2 V supply. The VCO tuning range is 2.65 GHz, from 2.35 GHz to 5 GHz. And the phase noise is -117 dBc/Hz at the 1 MHz offset when the center frequency is 3.2 GHz.

이 글은 공정, 전압, 온도 변화를 극복하기 위한 2단계 자동 트랜스컨덕턴스 조절 기능을 가진 저전력, 광대역 전압제어발진기의 설계에 관한 논문이다. 광대역에서 전압제어발진기를 발진시키기 위해, 디지털 자동 트랜스컨덕턴스 조절 루프와 아날로그 자동 진폭조절 루프가 사용되었다. 전압제어발진기의 출력 스윙 크기에 따라 트랜지스터의 바디전압을 조절하는 기능도 저전력 구현을 위해 설계되었다. 소모전류는 1.2 V 공급전압에서 2 mA에서 6 mA까지 1 mA 단위로 조절된다. 전압제어발진기의 튜닝 범위는 2.35 GHz에서 5 GHz까지 2.65 GHz로써 72%이다. 위상잡음은 중심주파수 3.2 GHz를 기준으로 1MHz 떨어진 지점에서 -117 dBc/Hz 이다.

Keywords

References

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