摘要
本文介绍一种新的D/A转换方法,并着重其硬件组成和工作原理。该方法是当系统中已经采用了8155芯片,则利用其计数口作某些参数的D/A转换,既省去了专用D/A,又使8155芯片得到了充分的利用。该方法转换线路简单,易于隔离,分辩率高,易于实现远距离传送。我们曾在煮茧机自动温控、混合饲料自动计量配料等系统中广泛应用,取得了很好的效果。
A new method of D/A conversion is introduced, and the point of introduction lies in the hardware constitution and working principle of the D/A. The method uses the counter of the IC 8155 as the D/A conversion for some parameters, if a controlling system has already a IC 8155 in its circuit, which makes a special D/A saved and the IC 8155 fully used. The method has the features of simple circuit, low cost and high resolution factor. It is easy to separate and to realize long-distance transmission. The method was successfully used by the authors in the system of the controlling temperature and pressure for cocoon boiling machine and in the system of auto-measuring burden of mixed food.
出处
《宁波大学学报(理工版)》
CAS
1993年第1期114-117,共4页
Journal of Ningbo University:Natural Science and Engineering Edition