CAJ | 학술논문

分析研究了等精度测量频率计的测量精度远低于理论值并且随被测信号频率变化而变化的原因，结果发现目前常见的等精度频率计的同步门电路在实际闸门下降沿和被测信号上升沿存在竞争冒险，产生的干扰脉冲影响了测量精度。针对此问题提出了几种同步门电路的改进设计。测试结果表明，改进后的几种同步门电路，不存在竞争冒险。采用改进后同步门电路的频率计，测量精度接近理论值，实现了等精度测量。
분석연구료등정도측량빈솔계적측량정도원저우이론치병차수피측신호빈솔변화이변화적원인，결과발현목전상견적등정도빈솔계적동보문전로재실제갑문하강연화피측신호상승연존재경쟁모험，산생적간우맥충영향료측량정도。침대차문제제출료궤충동보문전로적개진설계。측시결과표명，개진후적궤충동보문전로，불존재경쟁모험。채용개진후동보문전로적빈솔계，측량정도접근이론치，실현료등정도측량。
In this paper, the cause, that measurement accuracy of the equal-precision frequency measurement meter is far lower than the theoretical value and it is varied with measured frequency , is analyzed .The researched results show that there is a race-hazard in the falling edge of the actual signal and the rising edge of the measured signals of the synchronous gate circuit that is used commonly , and the frequency measurement precision is influenced by the re-sulting interference impulse .In order to solve the problem , several improved design solutions for synchronous gate cir-cuit are brought forward .These proposed schemes are tested and the results demonstrate that there is no interference impulse.The measurement accuracy of the equal-precision frequency measurement meter with improved synchronous gate circuit is in agreement with the theoretical value very well .So the equal-precision frequency measurement can be realized.