Soction $R$

Question $3$

Using the generalized frequency response shown in Figure Q$3\mathrm{.}0$ as a guide, and a transistor BFR$-180$; design a three$-$stage DC ral voltage $V_e$ of $12$ V $.$ AC input signal voltage is $0\mathrm{.}75$ mV $,$ frequency VHF at $f_{L}8-3dB$ is $30$ MHz and base$-$emitter function voltage $V_{\text{m}\text{e}\text{r}}$ is $0\mathrm{.}7$ V $.$ See attached transistor datasheet for other details.

URE$=10\%V$

Figue $0\mathrm{.}3$

State on your hard answer script

a$)$ any design assumptions $-V_{CE}=50\%V_{CC},V_{RC}=40\%VCl,$

$2$ mark

b$)$ any design equations

$7$ marks

Draw on your hardcopy answer script the

c$)$ Circuit diagram showing the $3-$stage amplifier

$1$ mark.

DC equivalent circuit for the $3-$stages

$3$ marks.

Calculate the following. Emitter resistors $($Vers Veas Veri$)$ respectively

$9$ marks

e$)$ Collector and Emitter resistances $(($:$R_{45},R_{t2},R_{42},R_{12},R_{42},R_{63}$