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一、前言目前,国内各种频率计和信号发生器虽然品种繁多,但大都功能单一,集成度不高,有些甚至还用分立元件组成,形体笨重,稳定性差,故障较多;许多频率计不能测量20HZ 以下的低频信号或超低频信号;另外,同时使用两种仪器时,占用空间大,携带不方便,给使用与维护带来麻烦。根据上述情况,长沙矿山研究院研制了一种结构新颖的多功能通用仪器——FG—1型数字频率计/信号发生器。二、整机方案的考虑我们采用频率计与信号发生器两套完全独立工作的电路。频率计部分采用大规模集成电
I. Introduction At present, although various kinds of frequency meters and signal generators in our country have a great variety of functions, most of them are single-function ones with low integration level. Some of them even use discrete components, which are bulky, poor in stability and faulty. Many frequency counters can not Measure the low-frequency signal below 20HZ or ultra low frequency signal; In addition, when using two kinds of instruments at the same time, it takes up large space and is inconvenient to carry, which brings trouble to use and maintenance. According to the above situation, Changsha Institute of Mining has developed a novel structure of versatile universal instrument - FG-1 digital frequency meter / signal generator. Second, consider the whole program We use two sets of frequency meter and signal generator completely independent of the circuit. Frequency meter part using large-scale integrated