An Operational Amplifier Question (help) - Electronic Circuits Projects Diagrams Free

goodness52200 · 17th October 2005, 09:10 AM

In the figure, why Ia=Ib (use observatinoal method)

Thanks a lot

aibelectronics · 17th October 2005, 09:44 AM

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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17th October 2005, 09:10 AM	(permalink)
goodness52200	An Operational Amplifier Question (help) In the figure, why Ia=Ib (use observatinoal method) Thanks a lot

17th October 2005, 09:44 AM	(permalink)
aibelectronics	reply 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. __________________ Everybody can but not everybody will.