Question

Notify Me Bookmark

For the single-stage npn BJT amplifier circuit shown in Fig. Q8, the BJT Q1 has the following parameters: IS = 10−15 A, β = 100 and VA = 100 V. (a) What is the amplifier configuration? (2 marks) (b) Calculate the biasing DC collector current of BJT Q1, IC,Q1. (6 marks) (c) Calculate the AC small signal model parameters of BJT Q1. (3 marks) (d) Calculate the two port parameters, Gm, Rin and Rout . ( 5 marks) (e) Estimate the voltage gain (vout/vin ) of the amplifier. (4 marks)

For the single-stage npn BJT amplifier circuit shown in Fig. Q8, the BJT Q1 has the following parameters: IS = 10−15 A, β = 100 and VA = 100 V. (a) What is the amplifier configuration? (2 marks) (b) Calculate the biasing DC collector current of BJT Q1, IC,Q1. (6 marks) (c) Calculate the AC small signal model parameters of BJT Q1. (3 marks) (d) Calculate the two port parameters, Gm, Rin and Rout . ( 5 marks) (e) Estimate the voltage gain (vout/vin ) of the amplifier. (4 marks)

Image text
For the single-stage npn BJT amplifier circuit shown in Fig. Q8, the BJT Q1 has the following parameters: I S = 10 − 15 A , β = 100 and V A = 100 V . (a) What is the amplifier configuration? (2 marks) (b) Calculate the biasing DC collector current of BJT Q1, I C , Q I . (6 marks) (c) Calculate the A C small signal model parameters of BJT Q1. (3 marks) (d) Calculate the two port parameters, G m , R in and R out . ( 5 marks) (e) Estimate the voltage gain ( v out / v in ) of the amplifier. (4 marks)

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

In the amplifier circuit shown in Fig. Q5, the BJT Q1 has β = 100 and VA = 100 V. The MOSFETs, M1 and M2, are identical with VTH = −1.0 V, Kp = 2 mA/V2 and they do not experience Channel Length Modulation effect. The temperature is 300 K. Fig. Q5 The BJT Q1 operates in the forward active mode and its collector current, IC, Q1 = 1.6 mA. Ignore the Early effect of the BJT when performing DC analysis. (a) Determine the drain current of the MOSFET M2, ID, M2. (6 marks) (b) Determine R3 that will give rise to the desired IC, Q1. (4 marks) (c) Determine the values of the 2-port network equivalent parameters of the amplifier: Gm (or Av), Rin and Rout. (8 marks) (d) Determine the gain (vout/vs) of the amplifier. (2 marks)
Solution
0 0

Q6. For the amplifier circuit shown in Fig. Q6, the MOS Transistor Ml has the following parameters: Kn = 1 mAV−2, and VTHN = 1 V. MOS transistors M2 and M3 are identical and have the following parameters: Kp = 1 mAV−2, and VTHP = −1 V. Fig. Q6 (a) Perform the DC analysis of the amplifier circuit shown in Fig. Q6, and show that the DC gate voltage of Ml is 5 V. You need to explain briefly your answer. (b) Calculate the value of RS such that the drain current of MI is 4 mA. Verify that the Ml is operating in the saturation region. [ Ans: Rs = 0.5 kΩ] (c) Calculate the parameters, gm and ro, of the small-signal model of the transistor Ml. [Ans: gm, M1 = 4 mAV−1, and ro, M1 = ∞ ] (d) What is the configuration of this amplifier? (e) Calculate the values of Rin , and Rout . [Ans: Rin = 5 kΩ and Rout = 2 kΩ ] (f) Estimate the voltage gain, Av( = vout /vin ). [ Ans: AV = −1.78]

Solution
0 0

Q3. Figure Q3 shows a single-stage amplifier with current mirror biasing. For the two p channel MOSFETs, VTHP1 = VTHP2 = −1 V, λP1 = λP2 = 0, Kp,M1 = Kp,M2 = 2 mAV−2. For the pnp BJT, β = 100, VA = 100 V. Fig. Q3 (a) Design RREF such that ID,M1 = 1 mA. [ Ans: RREF = 8.29 kΩ] (b) Calculate the small signal parameters of Q1, i. e. , gm,Q1, rπ,Q1 and ro,Q1. (c) Identify the configuration of the single-stage amplifier. (d) Determine the parameters, Gm, Rin and Rout of the two-port network of the amplifier. (e) Determine the gain vo/vs of the amplifier using the 2-port network parameters derived in part (d). [Ans: vo/vs ≈ −180]

Solution
0 0