Worksheet No. 7

Figure

No. 1 (circuit above) Calculate the capacitance of C₁, to design a proper working bypass capacitor for the load R_L. Frequency range: 20 - 20000 Hz

No. 2 (circuit below)

a) Draw the dc equivalent circuit.
b) Calculate the following dc values: I_C, V_CE
c) Draw the ac equivalent circuit.
d) Calculate the ac emitter resistance (r_e) and the ac collector resistance (r_c).
e) What is the voltage gain A_V?
f) What happens to the voltage gain if the supply voltage doubles?

Figure