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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
the voltages at the inverting and non-inverting inputs are equal (v-=v+), the two resistors to the supply are also equal (R1=R1) and I assume vI1 and vI2 are equal? hence Ia=Ib.
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