P 6.3-2 Find v_o and i_o for the circuit of Figure P 6.3-2.

Figure P 6.3-2

Add a few notations to the diagram for references

Remembering the first rule of ideal op-amps, the output voltage adjust itself so that the inverting and non-inverting input voltages are the same. Hence, I have made each of them voltage V. Now do a voltage walk from the non-inverting input to the inverting input and we get:

Solving for i

Using the second rule of ideal op-amps, the inputs of the op-amp can carry no current, the current

Now the voltage V can be gotten by a voltage walk from ground and we get

Finally can be gotten by a voltage walk from the V on the top of the circuit

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This page last updated on March 12, 2019