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Open FET Sensor - Open-Gate Junction FET Electrometer with extremely low leakage current
Summary
The Open FET sensor is a field effect transistor-based sensor in which the gate electrode is connected only to the signal to be measured. Despite the extreme measuring sensitivity, the Open FET sensor is relatively robust. It tolerates input currents of a few 10 μA outside the measuring range and thus protects against electrostatic charges. The Open FET Sensor is particularly well suited for scanning force and scanning tunneling microscopy at low temperatures.
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