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在数字化测量和各种控制电路中,经常要用到各种频率的时间基准信号。但是,一般高精度时间信号发生器,多利用晶振脉冲经计数分频后获得,因此电路复杂、造价昂贵.这里介绍一种用一块静态显示的,即有二根导电橡胶的普通电子表(动态显示,即只有一根导电橡胶的效果欠佳),再装一个简单的附加电路,就可以作成高精度的时间信号发生器。能分别输出秒、10秒、分、10分、30分、1小时、10小时……等多种时间信号。现分别叙述如下:
In digital measurement and various control circuits, it is often necessary to use time reference signals of various frequencies. However, the general high-precision time signal generator, the use of crystal oscillator pulse count obtained after the frequency, so the circuit is complex and expensive. Here is a static display with a, that is, two conductive rubber ordinary electronic watch (dynamic Display, that is, only a conductive rubber effect), then install a simple additional circuit, you can make a high-precision time signal generator. Can output seconds, 10 seconds, minutes, 10 minutes, 30 minutes, 1 hour, 10 hours ... ... and other time signals. Now are described as follows: