摘要
给出了一个以较新思路设计的仪表量程自动转换逻辑电路。该电路的控制逻辑采用计数器分别对电路中A/D转换器发出的过量程脉冲(OR)和欠量程信号(UR)进行计数 ,并用计数器的输出作为量程编码去直接控制量程选择 ,同时它又作为量程指示信号。整个电路的全部逻辑在一片PLD中实现 ,而且系统稳定可靠。
A newmethod of rangement auto-selector logic with an original idea is schemed out.The control logˉic is achieved by counting the overrange/underrange pulse generated by A/D convertor itself.The output of counter acts as rangement code to control the selector,as well as the rangement indictor.The whole logic cir cuit is completed within a PLD and the system is reliable and stable.
出处
《国外电子元器件》
2004年第5期10-12,共3页
International Electronic Elements
