In the Op-Amp circuit shown, assume that the diode current follows the equation I = I_s exp (V/V_T) . For V_i = 2V, V_o = V₀₁, and for V_i = 4 V, V_o = V₀₂. The relationship between V₀₁ and V₀₂ is

For the Op-Amp circuit shown in the figure, V₀ is

For the BJT circuit shown, assume that the $$\beta $$ of the transistor is very large and V_BE = 0.7 V. The mode of operation of the BJT is

In a transconductance amplifier , it is desirable to have