Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design of Multi-Band VCO with Fast AFC Technique

광대역 고속 AFC 기법을 적용한 다중 대역 VCO의 설계

  • Ahn, Tae-Won (School of Electrical Engineering, Dongyang Technical College) ;
  • Yoon, Chan-Geun (School of Electrical Engineering, Dongyang Technical College) ;
  • Lee, Won-Seok (School of Electrical Engineering, Dongyang Technical College) ;
  • Moon, Yong (School of Electronic Engineering, Soongsil University)
  • 안태원 (동양공업전문대학 전기전자통신공학부) ;
  • 윤찬근 (동양공업전문대학 전기전자통신공학부) ;
  • 이원석 (동양공업전문대학 전기전자통신공학부) ;
  • 문용 (숭실대학교 전자공학과)
  • Published : 2006.06.21
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Abstract

Multi-band VCO with fast response adaptive frequency calibration (AFC) technique is designed in 1.8V $0.18{\mu}m$ CMOS process. The possible operation is verified for 5.8GHz band, 5.2GHz band, and 2.4GHz band using the switchable L-C resonators for 802.11a/b/g WLAN applications. To linearize its frequency-voltage gain, optimized multiple MOS varactor biasing technique is used. In order to operate in each band frequency range with reduced VCO gain, 4-bit digitally controlled switched-capacitor bank is used and a wide-range digital logic quadricorrelator is implemented for fast frequency detector.

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