상세정보
학술지
Fast-Lock Hybrid PLL Combining Fractional- N and Integer-N Modes of Differing Bandwidths
- 저자
- Kyoung Ho Woo, Yong Liu, 남은수, Don Hee Ham
- 발행일
- 200802
- 출처
- IEEE Journal of Solid-State Circuits, v.43 no.2, pp.379-389
- ISSN
- 0018-9200
- 출판사
- IEEE
- 협약과제
- 07DB1100, 3차원 거리/영상 신호처리 집적화 회로를 내장한 InGaAs 광검출 수신기, 김호영
- 초록
- We introduce a single-loop PLL that operates in a narrower-bandwidth, integer- mode during phase lock and in a wider-bandwidth, fractional-N mode during transient. This hybrid PLL, as a generalization of the conventional variable-bandwidth PLL that shins only its bandwidth, simultaneously achieves the fast-locking advantage of the fractional-N PLL and design simplicity of the integer-N PLL, and as such, brings benefits in certain important PLL applications. In addition, the frequency division mode switching, unique in the hybrid PLL, enables a new, more digital protocol to execute bandwidth switching. A CMOS IC prototype attests to the validity of the proposed approach. © 2008 IEEE.
- KSP 제안 키워드
- Bandwidth Switching, CMOS IC, Fractional-N PLL, Frequency division, Phase lock, Single-loop, Variable bandwidth, fast-locking, integer-n, mode switching