The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A Gain and NF Dynamic Controllable Wideband Low Noise Amplifier

이득과 잡음 지수의 동적 제어가 가능한 광대역 저 잡음 증폭기

  • Oh, Tae-Soo (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Seong-Kyun (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Huang, Guo-Chi (Electronics, Communications and Information Technology Institute, Queen's University of Belfast) ;
  • Kim, Byung-Sung (School of Information and Communication Engineering, Sungkyunkwan University)
  • 오태수 (성균관대학교 정보통신공학부) ;
  • 김성균 (성균관대학교 정보통신공학부) ;
  • 황과지 (퀸즈대학교 ECIT 연구소) ;
  • 김병성 (성균관대학교 정보통신공학부)
  • Published : 2009.09.30
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Abstract

A common drain feedback CMOS wideband LNA with current bleeding and input inductive series-peaking techniques is presented in this paper. DC coupling is adopted between cascode and feedback amplifiers, so that the gain and NF of the LNA can be dynamically controlled by adjusting the bleeding current. The fabricated LNA shows the bandwidth of 2.5 GHz. The high gain mode shows 17.5 dB gain with $1.7{\sim}2.8\;dB$ NF and consumes 27 mW power and the low gain mode has 14 dB gain with $2.7{\sim}4.0\;dB$ NF and dissipates 1.8 mW from 1.8 V supply.

본 논문에서는 전류 블리딩(bleeding)과 입력 인덕티브 직렬-피킹을 이용한 공통 드레인 귀환(Common Drain Feedback: CDFB) CMOS 광대역 저잡음 증폭기(Low Noise Amplifier: LNA)를 설계하였다. 캐스코드 증폭기와 귀환 증폭기를 DC 결합하여 블리딩 전류의 조정을 통해 LNA의 이득과 잡음 지수(Noise figure: NF)의 동적 제어를 실현하였다. 제작한 LNA는 2.5 GHz의 대역폭에서, 고이득 영역은 $1.7{\sim}2.8\;dB$ NF와 17.5 dB 이득, 그리고 27 mW의 전력 소비를 보이고, 저 이득 영역은 $2.7{\sim}4.0\;dB$ NF와 14 dB 이득, 그리고 1.8 mW의 전력 소비를 보인다.

Keywords

References

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