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All questions refer to textbook problem 13.59. For questions 7-11, a 2 kq unbypassed Re is...
gm = 1.6 mS, r(pi)= 62.5 kOhm, ro= 1.875 MOhm, Rin= 39.2 kOhm,
Rout= 37.6 kOhm, Av = -59, Av with RE added = -14.6, RiB with RE
added = 264.5 kOhm
The ac equivalent circuit for an amplifier is shown in Fig. P13.59. Assume the capacitors have infinite value, R = 750 12, RB = 100 k12, Rc = 62 k22, and R3 = 100 k12. Calculate the voltage gain and input resistance for the amplifier if the BJT...
4. For the amplifier in the figure below use the parameters in the table: +Vcc Re VBE- 0.7V, Ri- 1002, R1-160k2, R2-320k2 R3-200k2, R6-40 k2, Rc-60k2, Vcc- 12V, Ry Do a) Draw the DC equivalent circuit and calculate the Q-point. c) Draw the AC equivalent circuit with the small signal model for the transistor. d) Calculate the voltage gain, Av-Vo/vi. Assume ro infinite. e) Draw the circuit to find the amplifier input resistance (Rin). Calculate Rin f Draw the circuit...
5. (20 points) For the amplifier in the following figure: +Vcc Rout Rc C3 R2 Rin Ri 1 k R3 Vo Vi R1 RE -VEE a) Draw the de equivalent circuit and find the Q-point. Assume B -75 b) Draw the equivalent circuit used for ac analysis. Find the values in Thevenin equivalent representation for the amplifiers between C, and C as shown below. What is the maximum value of v, that satisfies the small- signal assumption? Rout Ri vi...
All questions refer to the "simplified" CE amplifier shown below that has no RE at all, and no Cg. There is also no CL. The bias circuit gives Ic 1.5 mA The transistor has B 120, ro 50 k, Cu 1.5 pF and C 9 pF. You can neglect r. VCC RC 5k C2 +Vo C1 2uF RI R3 Vi- 10k 100 2uF RB 200k a) Find the short-circuit time constants Ti and Ta for capacitors C1and Ca, and find...
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R; " Problem 2) What are the values of Rin, Rout, Ay, and A, for the amplifier given if R = 5000, R3 = 1MA, RE = 120k2, Rc = 56k2, R3 = 500kn, Vcc = 15V, -Vee = -15V? Assume Q-point of the transistor is known as (0.109mA, 12.2V). Use B. = 100 and assume VA = 00. (a) Find the small-signal parameters (9m, Pero). (b) Draw the small-signal model for the circuit." (c) Compute Rin, Rout,...
Voc Ri Rc C2 + RS G Q2N3904 RL Vout 2 R2 RE CE Rin Rout Cu B 1x B C o + V be : Cr 8m'be E VCC R R2 Rc RE RS RL С. Cz CE 12 V 8.2 kg 3.9 ko 6.3 k2 3.3 kΩ 3 ko 3.9 ko 10 uF 1uF 100 u Assume the 2N3904 has a 8 =100, Veron} = 0.7V, VA= 100V, C=100, C=13.9pF and Ce=8pF. Use the emission coefficient as n...
3 Question 2 (2 points) All questions refer to a "simplified" CE amplifier that has no Rg at all, and no C3 The other components are: R1 100 Ω, RB-200 k , RC-5 kQ, R3 10 kr. The amplifier has input and output coupling capacitors C1 C2 10 μF. There is no CL. The bias circuit gives 1c"# 1.5 mA. The transistor has β = 120, ro-50 kQ, Cu-2 pF and C,-12 pF. You can neglect rx. What is the...
ENG 301 Electronics II Homework 2 1 Refer to Figure 1 Asame 50and Varfon)-7 V for all BITs in the circuit. Foe R, 12 k and Re 10 k. find the áfferential voltape gain A) of the difficrential amplifier taken as one sided eutput at r Figure 2 Voe+12 v Rc 10in SR 315 口 SR 67.3 kh R Ca R, R R R 250a 32 k Figure The circuit shown in Figure has transistor parameters 120 and (a) Determine...
1.0 kn. RE-390 Ω, r-15 Ω. and ßac-75. 5. For a common-emitter amplifier, Rc Assuming that Rg is completely bypassed at the operating frequency, the voltage gain is (a) 66.7 (d) 75 (b) 2.56 (c) 2.47 6. In the circuit of Question 5, if the frequency is reduced to the point where Xctbypass) RE, the voltage gain (a) remains the same (b) is less (c) is greater 7. In a common-emitter amplifier with voltage-divider bias, Rimlbase) 68 k2, Ri 33...
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Problem 2 On the circuit on Figure P2, transi stor Q1 has a threshold voltage of Vt = 2 V and a transconductance parameter of k = 100 mA/V2. Note that Vcc = -Vee = 4.5 V. Moreover, capacitors C1, C2, and C3 can be assumed to be very large VDD 4.5.0 R3 25kQ R1 300kn C2 Vout C1 Rsig Q1 1k0 R2 200kn Vsig (R4 2kQ C3 -4.5V VSS...