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Ammeter with six decade range

2017-08-19 00:17  
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The Ammeter measures currents from 100 pA to 100 ?μ without the use of expensive high value resistors.
Ammeter with six decade range

Accuracy at 100 ?μ is limited by the offset voltage between Ql and Q2 and, at 100 pA, by the inverting bias current of the LT1008.

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