Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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CMOS Power Amplifier Using Mode Changeable Autotransformer

모드변환 가능한 단권변압기를 이용한 CMOS 전력증폭기

  • 류현식 (부산대학교 전자전기 컴퓨터공학부) ;
  • 남일구 (부산대학교 전자전기 컴퓨터공학부) ;
  • 이동호 (한밭대학교 정보통신공학과) ;
  • 이옥구 (부산대학교 전자전기 컴퓨터공학부)
  • Received : 2014.01.29
  • Accepted : 2014.04.03
  • Published : 2014.04.25
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Abstract

In this paper, in order to improve efficiency performance of power amplifiers, a mode changeable autotransformer is proposed. Efficiency performance at the low-power mode can be improved by adopting the mode changeable autotransformer. A dual-mode autotransfomrer CMOS power amplifier using a standard 0.18-${\mu}m$ CMOS process is designed in this work. Number of turns in a primary winding is re-configurated according to mode change between the high-power mode and the low-power mode. Thus, the efficiency performance of the power amplifier at each mode is optimized. EM and total circuit simulation results verify that low-power mode power added efficiency(PAE) at 24dBm output power is improved from 10.4% to 26.1% using the proposed multi-mode operation.

본 논문에서는 전력증폭기의 효율을 증가시키기 위해서 모드변환 가능한 단권변압기를 제안한다. 모드변환 가능한 단권변압기를 통해 전력증폭기의 저 전력 모드 동작 시 효율을 개선할 수 있다. 이 논문에서는 0.18-${\mu}m$ CMOS 표준 공정을 이용하여 듀얼모드 단권변압기를 이용한 CMOS 전력증폭기를 설계하였다. 고 전력 모드와 저 전력 모드에서 단권변압기의 1차 권선의 권선수를 조절하여 전력증폭기의 동작을 최적화하였다. EM 시뮬레이션 및 전체 회로 시뮬레이션 결과 제안된 멀티모드 CMOS 전력증폭기의 출력전력이 24dBm일 때 전력부가효율(PAE)이 10.4%에서 멀티모드 동작으로 26.1% 로 상승하여 전력증폭기의 성능 개선되었다.

Keywords

References

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