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cepin
- 本频率计具有测周、测频、测量占空比等基本功能，能自动换档-The frequency meter has a measurement weeks, measuring frequency, measuring the basic functions of duty cycle, etc., can automatic transmission
BasedonCPLDFPGAsuchasthefrequencyaccuracyofthedesi
- 基于CPLD／FPGA的可编程逻辑器件，借助单片机AT89C51；利用标准频率50～100MHz的周期信号实现系统计数的等精度测量技术。同时采用闸门测量技术完成脉宽,占空比的测量。-Based on CPLD/FPGA programmable logic devices, with single-chip microcomputer AT89C51 using a standard 50 ~ 100MHz frequency of the periodic signal, such as c
fequency
- 基于CPLD的等精度数度频率计，可以通过外设功能按键实现，频率、相位、占空比等参数的测量。-CPLD based on the number of degrees of accuracy, such as frequency meter, key peripheral functions can be achieved, frequency, phase, duty cycle measurement of parameters such as
zhkb
- 这是一个测量方波占空比的源代码！用的是VHDL语言编写的！-This is a measurement of the square wave duty cycle of the source code! Using the VHDL language to!
Fmeter
- 基于FPGA的VHDL程序，实现双精度频率计功能，包括频率计数、测量占空比等-FPGA-based VHDL procedures to achieve double-precision frequency meter functions, including frequency counting, measuring duty cycle, etc.
frequency_meteris_report
- VHDL数字频率计的相关设计报告，讲解了频率测量和占空比测量的原理和实现方式-VHDL related design report of digital frequency meter, explained the frequency measurement and duty ratio measuring principle and the methods of realization
方案二
- 本系统是基于CPLD和单片机的一种用于信号频率周期、时间间隔和占空比测量的数字频率计，系统由AGC（自动增益控制）电路、宽带放大电路、高速比较电路实现有效值10mV/频率100MHz和处理显示部分组成，其中AGC电路实现幅度自动增益控制使放大后的信号幅度在一定的范围内保持一致，比较电路将前级电路输出的信号转换成CPLD,利用等精度测频原理，实现闸门时间1S的高精度测量。单片机通信处理数据并显示，数据表明，系统精度达到发挥部分要求。(This system is a CPLD microcontr
frenq2
- 数字硬件频率计 带有频率测量和占空比测量功能(Digital hardware frequency meter Frequency measurement and duty ratio measurement function)