(Solved): Please do it carefully (a) Identify the following op amp circuit (Circuit 3). Calculate the diffe ...

Please do it carefully

(a) Identify the following op amp circuit (Circuit 3). Calculate the differential gain \( \left(v_{\mathrm{d}}\left(v_{2}-v_{1}\right)\right) \) and the differential input resistance \( \left(R_{i d}\right) \) of the op amp circuit. b) Consider the op amp circuit shown in Circuit 4. Mention two advantages of the circuit over the op amp circuit shown in Circuit 3 . Show that the overall gain, Aow, of the circuit shown (Circuit 4 ) is given as, \[ A_{j o}=\frac{v_{0}}{v_{2}-v_{1}}=\frac{R_{2}}{R_{1}}\left(1+\frac{R_{f}}{R}\right) \rightsquigarrow \] (e) Design the amplifier (Circuit 4) so that it has an overall gain of 1000 V/V. Choose resistor values not more than \( 10 \mathrm{k} \) and limit the gain of the basic difference amplificr to not more than 10 . [8]