EXERCISE

$6\mathrm{.}53$ Consider the emitter$-$degenerated CE circuit of Fig. $6\mathrm{.}66$ when biased as in Exercise $6\mathrm{.}51.$ In particular, refer to Fig. E$6\mathrm{.}51$ for the bias currents and for the values of the elements of the BJT model at the bias point. Let the amplifier be fed from a source having $R_{\text{s}\text{i}\text{g}}=5k,$ and let $R_L=5k.$ Find the value of $R_e$ that results in $R_{in}$ equal to four times the source resistance $R_{\text{s}\text{i}\text{g}}.$ For this value of $R_e,$ find $A_{vo},R_0,A_v,$ and $G_v.$ If $v_{}$ is to be limited to $5$ mV $,$ what is the maximum value $v_{\text{s}\text{i}\text{g}}$can have with and without $R_e$ included? Find the corresponding $v_o.$

Ans. $225$;$-32\frac{V}{V}$;$8k$;$-12\mathrm{.}3\frac{V}{V}$;$-9\mathrm{.}8\frac{V}{V}$;$62\mathrm{.}5mV$;$15mV$;$0\mathrm{.}6V$