OPAM_PICOAMMETER

Published:2009/7/8 22:05:00 Author:May | From:SeekIC

Current-to-voltage converter connection for CA3160 and CA31400 bipolar MOS opamps provides full-scale meter deflection for ±3 pA CA3160 is operated in guarded mode to reduce leakage current.CA3140 provides gain of 100 for driving zerocenter microammeter. With suitable switching, full-scale current ranges of 3 pA to 1 nA can be handled with single 10.000-megohm resistor in overall feedback path．-″Circuit Ideas for RCALinear ICs″RCA Solid State Division Someville,NJ,977,ρ 14.



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