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임베디드 시스템의 정확성 향상을 위한 클럭 주파수 검출기
정광현,Jeong, Gwanghyeon 한국군사과학기술학회 2020 한국군사과학기술학회지 Vol.23 No.5
In this paper, the frequency detector which detects the clock frequency of the embedded system is proposed and analyzed. The proposed frequency detector is consisted of filter and peak voltage detector. The clock signal is converted from square wave to triangular wave by the filter. The peak voltage of the triangular wave is determined according to the frequency response of filter. The peak voltage detector detects and holds the peak voltage of the signal. Moreover, the proposed clock frequency detector can detect the frequency within 1ms and it gives guarantee of real-time operation.
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.