5. (a) A transistor amplifier is shown in Fig. 11. Draw the small-signal equivalent circuit of this amplifier. Make sure you simplify your equivalent circuit as much as possible. Vcc Rcv RF RC2 + C2 RL Vout C₁ + Vin Figure 11: Transistor amplifier. (b) The small-signal equivalent circuit of a common-emitter amplifier is shown in Fig. 12. Derive expressions for the following small-signal quantities. Vout (i) The small-signal voltage gain A Vin (ii) The small-signal input resistance Rin (iii) The small-signal output resistance Rout iin Vin 'in Vin + Bib T' RL Vout RE RB 20 Figure 12: Small-signal equivalent circuit of a common-emitter amplifier.

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5. (a) A transistor amplifier is shown in Fig. 11. Draw the small-signal equivalent circuit of this
amplifier. Make sure you simplify your equivalent circuit as much as possible.
Vcc
Rcv
RF
RC2
+
C2
RL
Vout
C₁
+
Vin
Figure 11: Transistor amplifier.
(b) The small-signal equivalent circuit of a common-emitter amplifier is shown in Fig. 12.
Derive expressions for the following small-signal quantities.
Vout
(i) The small-signal voltage gain A
Vin
(ii) The small-signal input resistance Rin
(iii) The small-signal output resistance Rout
iin
Vin
'in
Vin
+
Bib
T'
RL
Vout
RE
RB
20
Figure 12: Small-signal equivalent circuit of a common-emitter amplifier.
Transcribed Image Text:5. (a) A transistor amplifier is shown in Fig. 11. Draw the small-signal equivalent circuit of this amplifier. Make sure you simplify your equivalent circuit as much as possible. Vcc Rcv RF RC2 + C2 RL Vout C₁ + Vin Figure 11: Transistor amplifier. (b) The small-signal equivalent circuit of a common-emitter amplifier is shown in Fig. 12. Derive expressions for the following small-signal quantities. Vout (i) The small-signal voltage gain A Vin (ii) The small-signal input resistance Rin (iii) The small-signal output resistance Rout iin Vin 'in Vin + Bib T' RL Vout RE RB 20 Figure 12: Small-signal equivalent circuit of a common-emitter amplifier.
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