A small signal source, \(V_i(t)=A\cos(10^5t)+B\sin(10^7t)\) is applied to a BJT circuit as shown in the figure.
Assume zero source resistance, \(V_{BE}=0.7\) V, \(\beta_{dc}=99\), Early voltage \(=100\) V and thermal voltage \(=25\) mV. Effect of internal parasitic capacitances of the BJT may be neglected.
Which expression is the best approximation of the output voltage \(V_o(t)\)?