Circuit of 60 fA op.amplifier elaborated at India for electrometric Farady Cup. Factually FC is a CURRENT source with physical resistivity about 10^17 Ohms, thus I guess, may be the "dumb mistake" in circuit isnt mistake at all?? What is Your opinion? Circuit stands in article https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.496.7448&rep=rep1&type=pdf page 10 fig 5 and surprizing point is where 1.0 GOhm meets 10 MOhm.
Do this is a mistake or ultra-deep wisdom?
- Thread starter Janis59
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