LOW_LEVEL_CURRENT_DETECTOR_AND_MEMORY

Published:2009/7/17 2:59:00 Author:Jessie | From:SeekIC

Unknown current Ix charges C1, 0percttion of relay K1 by interrogate pulse discharges C1 through tunnel diode, initiating switching of diode if in low-voltage state and unknown current is correct polarity. Lamp in transistor amplifier glows when tunnel diode is in high-voltage state. Currents of one picoampere can be measured.-C. D. Todd, Tunnel Diode Detects Currents Down to 100 Femtoamperes, Electronics, 36:14, p 33-37.



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