Consider the following circuit using an ideal op-amp. The I-V characteristics of the diode is described by the relation $${\text{I}} = {{\text{I}}_0}\left( {{{\text{e}}^{\frac{{\text{V}}}{{{{\text{V}}_{\text{T}}}}}}} - 1} \right)$$   where V_T = 25 mV, I₀ = 1 µA and V is the voltage across the diode (taken as positive for forward bias).
For an input voltage V_i = -1 V, the output voltage V₀ is