Figure 4-9 illustrates such a system, which employs a Model 6487 Picoammeter/Voltage Source, Model 7158 Low Current Scanner Cards, and Model 7169A Form C Switch Cards.

 
  • 图4-9示出这样一种系统。该系统采用6487型皮安计电压源、7158型弱电流扫描器卡和7169A型C类开关卡。
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