These compact analyzers also offer high-performance functions, such as the1 Hz resolution frequency setting function and1 Hz resolution frequency counter function. 这些紧凑型分析仪还提供高效能的功能,例如:1Hz的决议频率设置功能和1赫兹决议频率计数器功能。
One example of a multiple closure would be to route a single device output to two instruments, such as a voltmeter and a frequency counter. 复用开关的一个简单例子就是将单台设备的输出连接到2台仪器,例如一台伏特表和一台频率计数器。
In this paper, we choose single chip microcomputer to make a digital frequency counter; meanwhile, direct measurement is taken in practice. 在本次毕业设计中我们选择使用单片机来制作数字频率计,并在实际制作中采用了直接测频法。
Simulation of Frequency Counter Based on Proteus and Keil 基于Proteus和Keil的频率计数器仿真
Automatic source-locking microwave frequency counter 自动微波锁相频率计数器
With application of the standard frequency source and the timer counter, the signal frequency and period are easily measured. 利用单片机内部高稳定度的标准频率源和定时/计数器,可方便地测量信号的频率和周期。
The hardware is mainly composed by8031, A/ D, and frequency counter, and the software is simple and efficient. 硬件主要以8031单片机为核心构成一个最简系统,软件简短有效。
A new and original type of interface circuit of frequency counter for monolithic microcomputer 一种新颖的单片机频率计接口电路
The training and organizing work for the national undergraduate electronic design competition is discussed in this article. According to the frequency counter based on MCU and CPLD that is designed by students, there emerge some questions in the design. 介绍了全国大学生电子设计竞赛的赛前组织工作和辅导工作,并以基于单片机和CPLD的数字频率计为例说明学生进行设计的过程。
Finally, a digital frequency counter is designed on count of the whole performance of the system. 最后又从系统的完整性角度出发设计了基于单片机的小型数字频率计数器。
Design of Singlechip-based Frequency Counter 基于单片机的频率计数器的设计
The design method, which realizes digital frequency counter of up to bottom based on VHDL is introduced. 介绍一种基于VHDL的采用自顶而下(uptobottom)设计方法实现的数字频率计。
In its digital processing circuit, clock chip with high precision and temperature compensation is uesd as reference clock. High frequency reversible counter is used to count trimmed impulse signal forward or backward and two pathes SAW signals are selected timely by multichannel selector. 数字信号处理电路采用高精度、具有温度补偿的时钟芯片作为基准时钟,采用高频可逆计数器对整形后的脉冲信号进行正向或逆向计数,采用高性能的多路选择器控制两路SAW信号的定时选择。
The paper introduces a method of digital electronic clock design based on EWB and the system is made up by silicon crystal oscillator, frequency divider, number counter, decoder circuit, LED display circuit, calibrated circuit, chirping circuit. 介绍了一种基于EWB软件设计电子钟的方法,系统由石英晶体振荡器、分频器、计数器、译码电路、LED显示电路、校时电路、整点报时电路组成。
In this paper, the control circuit of the continuous counter used in the TRANSIT satellite decoder is analysed and a method for fixing the circuit in the frequency counter of a JSZ-4 Doppler receiver made in China is also introduced. 本文所分折的是用于子午仪卫星译码器的连续计数控制电路。并对国产JSZ&4型多卜勒接收机频率计数器如何加装连控电路作一简单介绍。
This paper provided an actualization of 200 MHz or even more high frequency counter and presented the PC interface. 本文提出了一种利用常用逻辑器件,结合现场可编程器件实现200MHz甚至更高频率的高速计数器的方法,并与计算机接口。
The Design of Computer-Based Frequency Counter Using the Method of Equally Accurate Measurement 基于PC机的等精度频率测量仪器的设计
The detector system includes crystal sensors, oscillators, a frequency mixer, a fre-quency counter and a digit display. 检测器系统包括:晶体传感器、振荡器、变频器、频率计和数字显示;
SOC Implemetation of Self-Adaptive, High Sensitive Frequency Counter 自适应快速高精度数字频率计片上系统设计实现
Waveform, Sequence and Shift Counter Synthesis& Realization of Synchronous Frequency-Division by Means of Shift Counter 波形、序列及移位计数器的综合&用移位计数器实现同步分频
Owing to the limited frequency of the internal high-speed counter of PLC, the peripheral unit of PLC is used for PLC-based frequency measurement of hydraulic turbine governors. 基于可编程序控制器(PLC)的水轮机调速器,受PLC内部高速计数器最高计数频率的限制,频率测量大多通过PLC外部单元来实现。
Precision Improvement of Digital Frequency Counter with Match Strobe Signal 用选通门匹配方法提高计数式频率计的测量精度
The Method to Improve the Output Frequency Accuracy of Programmable Timer/ Counter Used as Pulse Generator 可编程定时/计数器作脉冲信号发生器时提高输出频率准确度的方法
It made use of the signal automatic gain control ( AGC) and complex logical control to realize the precise measurement of the ultrasonic signal, and made use of the logical analytical method to realize double frequency and 160 MHz frequency of the counter. 利用超声波信号的自动增益控制(AGC)和复杂的逻辑控制实现信号的精确测量;利用逻辑分析实现倍频,使计数器的计数频率达到160MHz;
Application of High Accuracy Phase and Frequency Counter in Electric Power System 高精度相位频率计在电力系统中的应用
The developed module are the arbitrary waveform generator based on DOS ( Direct Digital Synthesizer) technology as a signal source of testing system and the common testing device such as virtual spectrum analyzer-, virtual digital storage oscilloscopes virtual frequency counter etc. 所开发的模块有,采用DDS技术实现的任意波形发生器作为测试系统中的信号源,以及常见的信号测量设备,如虚拟频谱分析仪,虚拟数字存储示波器,虚拟频率计数器等虚拟仪器。
By the example of the digital frequency counter design on FPGA, this paper introduces the design of SOC ( System On Chip) based on FPGA/ CPLD. 通过例举基于FPGA的数字频率计的设计,阐述了如何利用FPGA/CPLD实现片上系统。
The core frequency can be frequency-doubled to hundreds of megabytes with utilizing the advantages of integrating phase-locked loop of inner FPGA. A high frequency pulse counter has been designed and the stable pulsed drive scanning motor can be produced by use of frequency splitting of FPGA. 利用FPGA内部集成锁相环,核心频率可以倍频至几百兆的优点,设计了高频脉冲计数器并利用FPGA分频产生稳定的脉冲驱动扫描电机。
FPGA was used as the main chip. The acquisition system is mainly divided into four parts, filter, frequency phase, counter and UART communications. 使用FPGA作为主控芯片,编码器输出正交信号采集系统主要分为滤波、倍频鉴相、计数、UART通信等4个部分。