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2 10pcs LMP7721MAX/NOPB SOP 8 LMP7721MAX LMP7721MA LMP7721 3 Femtoampere Input Bias Current Precision Amplifier 100%New Original|Battery Accessories & Charger Accessories| - AliExpress
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A femto ampere current amplifier based on a 30 000∶1 cryogenic current comparator | Semantic Scholar
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