How to calculate the Voltage on the scheme with inverted amplifier?

Question

Given input 1mA and resistances: 1kOmh and 100Ohm. Find the V[exit].

My try:

How to solve it?

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Looks like you already solved it, just be mindful of your signs. — Matt Young, Jan 28 '14 at 17:37
Why is there resistor connected to the ground? Does it make any difference? To me it does not make any sense... — J.Olufsen, Jan 28 '14 at 17:44
It's called a compensation resistor, and is there to null the effects of bias currents. When you're dealing with ideal op amp models, it is unnecessary. — Matt Young, Jan 28 '14 at 17:46

score 3 · Accepted Answer · answered Jan 28 '14 at 17:38

3

Given V- = V+ = 0V and no current flows into the opamp

Then input current = output current

1mA = (0-Vout)/1000

Therefore Vout = -1V

answered Jan 28 '14 at 17:38

Pyxzure

1 Answers1