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- W2048461193 abstract "A high-performance current generator for the picoampere region is presented. Although it was primarily developed as a part of an automatic test system to calibrate charge integrators for accelerating machines, it can suit a wide range of applications. It consists basically of a positive feedback loop of controlled gain which includes a varactor bridge operational amplifier. The essential features of the instrument are a 1 pA resolution and a 1015 Ω output impedance. The output is guarded and floating between −120 V and + 120 V, and the voltage across the external load is measured without affecting the delivered current by a digital panel meter on the front panel. The unit can therefore operate as a high-accuracy do impedance meter." @default.
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- W2048461193 date "1975-08-01" @default.
- W2048461193 modified "2023-09-23" @default.
- W2048461193 title "High-performance current generator with one-picoampere resolution" @default.
- W2048461193 doi "https://doi.org/10.1016/s0029-554x(75)80017-6" @default.
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