한국전자파학회:학술대회논문집 (Proceedings of the Korea Electromagnetic Engineering Society Conference)
- 한국전자파학회 2003년도 종합학술발표회 논문집 Vol.13 No.1
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- Pages.224-228
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- 2003
PLL Synthesizer를 이용한 새로운 FM 회로 설계 및 제작
Design and Implementation of a Novel Frequency Modulation Circuit using Phase Locked Synthesizer
- Yang, Seong-Sik (Dept. Radio Science and Engineering Chungnam National University) ;
- Lee, Jong-Hwan (Dept. Radio Science and Engineering Chungnam National University) ;
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Yeom, Kyung-Whan
(Dept. Radio Science and Engineering Chungnam National University)
- 발행 : 2003.11.15
초록
In this paper, for phase lock loop(PLL) synthesizer, we introduce a novel but simple and low cost frequency modulation(FM) circuit of a flat peak frequency deviation for modulation signal from high to very low frequency penetrating into the loop-bandwidth of PLL. The FM circuit was basically designed to compensate an amount of feedback of the loop filter in PLL. The circuit also includes the capability of the adjustment of peak frequency deviation and blocking the interference with the loop filter. The designed circuit was successfully implemented and showed the flat frequency deviation as expected in the design.