【摘要】 由于单片机所处理的信号是数字信号,对模拟电压信号进行检测处理时首先要用A／D转换器件对其进行A／D转换,然后再进行处理。本论文利用89C2051系列单片机内部独特的结构,不用A／D转换器件即可实现A／D转换,尽可能地降低成本和简化电路结构,并对其测量范围及转换精度进行分析和讨论。更多还原

【Abstract】 Since the signal which is disposed by the SCM usually is the Digital Signals, before the Analog signals are checked by the processor,they must be conversed by the A/D converter. This issue makes out a method to leave out the A/D converter using the special configuration of the SCM 89C2051. This method can reduce the price and make the circuit much more easily .Meanwhile this issue also discusses the measure ranges and the conversion precisions of this method.更多还原