电路实现基于PC的电压测量

摘要：在其最简单的形式，4通道10位A/D转换器（IC2）的几个被动元件，通过25针D型连接器连接到PC的打印机端口，PC的电压表组成。

Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsAmplifierandComparatorCircuitsKeywords:lowpoweredopamps,quadopamps,rail-to-railinputs,rail-to-railoutputs,rail-to-railopamps,opampApr10,2003APPLICATIONNOTE1988CircuitEnablesPC-BasedVoltageMeasurementsAbstract:Initssimplestform,thePCvoltmeterconsistsofa4-channel,10-bitA/Dconverter(IC2)withafewpassivecomponents,connectedtothePCprinterportviaa25-pinmaleD-typeconnector.Initssimplestform,thePCvoltmeterofFigure1consistsofsection"A"alone:a4-channel,10-bitA/Dconverter(IC2)withafewpassivecomponents,connectedtothePCprinterportviaa25-pinmaleD-typeconnector.Powerisderivedfrompins2and3,andthecir