摘要
提出一种基于单片机AT89S52控制的数字频率计的设计新方法。该方法将待测频率信号经过整形放大后输入单片机,然后由单片机控制内部计数器分别对待测信号和标准信号同时计数,再经运算处理得到测量结果,可自动量程转换,并由1602ALED显示器实时显示。该设计与传统测频系统相比,具有体积小、成本低、低功耗、精度高等优点,适用于各种测量电路。
A new design of digital frequency meter is proposed based on MCU AT89S52.By regulating amplifier the frequency signal input through the MCU,and then the internal counter by the MCU control signals count the measured and the standard signal at the same time.The design obtains the results by computing processing by 1602ALED real-time display,with automatic range switching.Compared with the conventional frequency measurement system,the propose design has small size,low cost,low power,high precision,for a variety of measurement circuit.
出处
《电子设计工程》
2012年第1期140-143,共4页
Electronic Design Engineering
