Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Fast Lock-Acquisition DLL by the Lock Detection

Lock detector를 사용하여 빠른 locking 시간을 갖는 DLL

  • 조용기 (국민대학교 전자정보통신공학부) ;
  • 이지행 (국민대학교 전자정보통신공학부) ;
  • 진수종 (국민대학교 전자정보통신공학부) ;
  • 이주애 (국민대학교 전자정보통신공학부) ;
  • 김대정 (국민대학교 전자정보통신공학부) ;
  • 민경식 (국민대학교 전자정보통신공학부) ;
  • 김동명 (국민대학교 전자정보통신공학부)
  • Published : 2003.07.01
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Abstract

This paper proposes a new locking algorithm of the delay locked loop (DLL) which reduces the lock-acquisition time and eliminates false locking problem to enlarge the operating frequency range. The proposed DLL uses the modified phase frequency detector (MPFD) and the modified charge pump (MCP) to avoid the false locking problem. Adopting a new lock detector that measures delay between elects helps the fast lock-acquisition time greatly. The idea has been confirmed by HSPICE simulations in a 0.35-${\mu}{\textrm}{m}$ CMOS process.

Keywords