photoconductive isolation amplifier with tracking reference +Vcc 3 + 7 0.1V 470Ω 6 1 IL300 8 90K 10K OP77 Gain Adjust +Vcc 1V 2 - 4 2 K2 7 Vin 900K K1 7.5K 5K -Vcc 20pF +Vcc 3 6 10V -Vcc 9M 4 5 4 10K -Vcc IP1 IP2 100V 2 - OP77 6 + 3 7 0 - 100 mV Output +Vcc -Vcc +Vref2 220pF 4 IP2 IP1 + 5 4 +Vref1 3 -Vcc 6 3 +Vcc 10K OP77 4.7K 4 - 2 6 Vcc K1 - 7 K2 2 OP77 7 2 6 Vcc +Vcc 1 470Ω + 5K 8 IL300 7 3 73.2K +Vcc Zero Adjust 1K Tracking Reference Appnote 50 11–12 Differential Photoconductive Isolation Amplifier is accomplished
in
„Grüne LED leuchtet schon bei ca 10 uA?“
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Analoge Elektronik und Schaltungstechnik
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