Question

7 Draw the DC and AC load lines for the amplifier of below on the given collector characteristics and determine the maximum output signal swing. (15 points) Do R, 2N2222 lc(mA) 12 1.-100-A 10 40 101 12 F V) 123 456789

Answer 1

Here we need to draw the DC and Ac load lines for the amplifier on given collector characteristics. here we can find maximum output signal swing By observing the given drawing figure, By making a loop as and apply, R_c and r-e and ground, so that, the calulation's are -1R + V_cE + I_c R_c + I_c r_E = 0 (alpha T_c) R_E + I_c R_c = 12 - V_cE So that I_c = 12 - V_cE/R_c + R_E - (1) Now we can also, here I_c = 3mA Here, we have ac, ft is bypassed by the capacitor, so that -12 + i_c R_c + V_cE = 0 i.e R + c = 12 - V_c E I_c = 12 - V_cE/R_c \r\n for our concept, we can assume, beta = qr, so that (100)I_B (1k) + I_B (4k) = 2.4 - 0.7 104 I_B = 1.7 I_B = 1.7/104 implies 17/1040 I_B implies 0.0163 mA {24.2/10 17/10 1.7 and I_c = BI_c = 1.62 mA