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。
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.
出处
《电讯技术》
2006年第4期193-195,共3页
Telecommunication Engineering
关键词
PIC单片机
等精度测量
频率测量
PIC micro - controller
equal precision measurement
frequency measurement
