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임베디드 시스템의 클럭 보상을 위한 RC 필터 기반의 주파수 검출기
유미화(Mi-hwa Yu),유동호(Dongho You),정광현(Gwanghyeon Jeong) 한국정보기술학회 2023 한국정보기술학회논문지 Vol.21 No.2
When performing communication between embedded systems, the loss of communication data occurs due to differences in clock frequencies. So, it is essential to achieve the constant clock frequency. Therefore, a clock frequency compensation system should be used, and a frequency detector is required for this. So, this paper proposes a frequency detector based on RC filter. The proposed frequency detector consists of a filter section that filters the input signal, a maximum voltage detection section that detects the maximum voltage of the filtered signal, and an output buffer to minimize the effect of the load size of the output stage. be. The frequency detector was mounted on a double-sided FR4 PCB board with commercial opamp and Diode and its operation was verified through measurements of the module.