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引用本文：

艾树峰.基于PIC单片机的测频仪的设计与实现[J].电讯技术，2006，46（4）：193 - 195. [点击复制]
.Design and Realization of a Frequency-measurement Meter Based on PIC Micro-controller[J].，2006，46（4）：193 - 195. [点击复制]

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基于PIC单片机的测频仪的设计与实现

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摘要:

设计了一种基于PIC单片机的测频仪。该系统利用CPLD实现对输入信号频率的等精度测量，利用数字量控制的梯形电阻网络实现系统增益从10～40dB可调、步进为6dB；采用PIC16F877单片机作为系统的控制器，并对增益和频率值进行数字显示。

关键词: PIC单片机等精度测量频率测量

DOI：10.3969/j.issn.1001-893X.

投稿时间：2006-03-21修订日期：2006-06-12

基金项目:

Design and Realization of a Frequency-measurement Meter Based on PIC Micro-controller

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Abstract:

A frequency-measurement meter is designed.This system uses CPLD to measure the frequency of the input signal with equal precision.It uses PIC16F877 micro-controller unit as its control part,regulates the system gain from the original 10dB to 40dB gradually(the step is 6dB) with the help of a network composed of digital control trapezium-shaped resistors, and provides digital indications of the system gain and frequency value.

Key words: PIC micro - controller equal precision measurement frequency measurement