상세정보
등록 자동 주파수 제어 회로를 포함하는 위상 고정 루프 회로 및 그것의 동작 방법
- 출원번호
- 12976449 (2010.12.22)
- 공개번호
- 20120056654 (2012.03.08)
- 등록번호
- 8350608 (2013.01.08)
- 출원국
- 미국
- 협약과제
- 10MB1700, 45nm급 혼성 SoC용 아날로그 회로기술, 권종기
- 초록
- Provided is a PLL circuit including automatic frequency control circuit and an operating method thereof. The voltage controlled oscillator is primarily controlled by an automatic frequency control circuit, and is secondarily controlled by a loop filter. The voltage controlled oscillator outputs a coarsely-tuned oscillation signal when primarily controlled, and outputs a finely-tuned oscillation signal when secondarily controlled. The PLL circuit can have a quick frequency fixing time, and output the oscillation signal having a broad and stable frequency. Moreover, the noise characteristic of the PLL circuit is enhanced.
- KSP 제안 키워드
- Automatic frequency control, Control Circuit, Frequency control, Loop circuit, Noise characteristics, PLL circuit, Voltage controlled oscillator(VCO), loop-filter(LF), phase locked, phase-locked loop(PLL), voltage controlled