Question

Question 9 CIRCUIT X/FIG.9 (5 Marks) Statement: Consider the RC-coupled amplifier circuit illustrated in Fig. 9 (CIRCUIT X). Sketching relevant output (Vc-Ic) characteristics that decide Q-point coordinates and DC load-line details (of the NPN-BJT/Si circuit of Fig. 9 of Circuit X) Further, establish an appropriate AC-load line and decide the maximum swing of the output voltage across Rload with respect to the Q-point. Assume the input signal at the base is a sine function with o = 21 x frequency (f) and, the circuit details as follows: Vcc = 18 volt; VE = 1.2 volt; Rload = 2.0 9 = k; Rs = 2 k; |Av = 120; VI = 0.026 volt; 1B1 Current through Rbi taken as 10% of the collector current; Frequency bandwidth (BW) response: 100 Hz to 10000 Hz; B = 120; and, S = 10.

please pick one of the multiple choice options above.

show all work, thank you

Answer 1

Dc analysis disable Ac sources opens the large capacitors Xc = If of de Retoc Vcc & RC RS Vr = 26 mv Av1 = 120 Rs=ak RBL ERE VE -1.2V RL=2k Vcc=18v B=120 VCC use IRC To calculate IB evc Rth MOVE = 12V VIE With = Vcc RB2 RBITRB2 VAL PRE Rth = ReillRB2 2 VE = IERE Ciraut, Even for solving de comalysis of this we must know RE RC, RB14 BBL it is impossible to find out all valors (Required) without Cestain inbomafiem. So, option. Verification is only possible

=> options, option@option are not correct answers because Icc = 18v is given in options VcQ = 18v VEQ = Vcc - ICQ Rc VEQ = Vec is possible when Icq=0, ICQ = 0) it is a unstable region for opecorating Q-point Now remaining options are option ③ & option from option : VcQ = VCC-ICQ RC = 18-2.02x4.35k so option also not correct - 9-21 but veQ is given 17-6 Volts in options C Check for optionly :- & are equal So, option & is the VcQ = Vcc - IQRc = 18 - 2.48 m x 3.38 Correct answer VcQ 9.618 Given (VeQ = 9.6V I'm optionly VcQ=9.6V

we know given IVE = 12V Ic = 2.48mA =2.5mA DE = 248( o ) = 2.48 x121 120 VE JERE [ option o RE = 479 Ic=2.48 MA VE =2.5 mx 479 TE =2.5mst = 1-1975 بع VE - 1.2V 04④ is again correct So, option 4 is The Correct one
option 4 is the correct answer.