Question

Notify Me Bookmark

Problem 4: (a) What are the Q-points for the transistors in the amplifier in Fig. P15.24 if VDD = 15 V, VSS = 15 V, RSS = 62 kΩ, and RD = 62 kΩ? Assume Kn = 400 μA/V2 and VTN = 1 V. (b) What are the differential-mode gain, common-mode gain, CMRR, and differential-mode and common-mode input resistances? Figure P15.24

Problem 4: (a) What are the Q-points for the transistors in the amplifier in Fig. P15.24 if VDD = 15 V, VSS = 15 V, RSS = 62 kΩ, and RD = 62 kΩ? Assume Kn = 400 μA/V2 and VTN = 1 V. (b) What are the differential-mode gain, common-mode gain, CMRR, and differential-mode and common-mode input resistances? Figure P15.24

Image text
Problem 4: (a) What are the Q-points for the transistors in the amplifier in Fig. P15.24 if V DD = 15 V , V SS = 15 V , R SS = 62 k Ω , and R D = 62 k Ω ? Assume K n = 400 μ A / V 2 and V TN = 1 V . (b) What are the differential-mode gain, common-mode gain, CMRR, and differential-mode and common-mode input resistances?
Figure P15.24

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

13.40. (a) What are the Q-points for the transistors in the amplifier in Fig. P13.40. if VDD = 15 V, VSS = 15 V, RSS = 51 kΩ, and RD = 82 kΩ? Assume Kp = 200 μA/V2 and VTP = −1 V. (b) What are the differential-mode gain, common-mode gain, CMRR, and differential-mode and common-mode input resistances?
Solution
0 0

For the amplifier in the figure given below, assume VDD = 12 V, VSS = 12 V, RSS = 15 kΩ, RD = 22 kΩ, Kn = 400 μA/V2, and VTN = 0.8 V. What are the differential-mode gain, common-mode gain, CMRR, and differential-mode and common-mode input resistances of the given amplifier? The differential-mode gain Adm = ; (Include a minus sign if necessary.) For a differential output, the common-mode rejection ratio CMRR = ; (Round the final answer to three decimal places.) The differential-mode input resistance Rid =
Solution
0 0

(a) Figure Q2(a) shows a differential amplifier with a current source at the bottom. It is given that VDD = VSS = 15 V, ISS = 300 μA, Early effect can be ignored (λ = 0), Kn = 400 μA/V2 and VTN = 1 V. You may assume MOSFET in saturation region. (i) For single ended outputs, draw the half-circuits and derive the algebraic equations for the differential mode and common-mode gains as well as CMRR. [6 Marks] (ii) For the above case of single ended output, what should be the value of Rss to get CMRR = 100? [4 Marks] Figure Q2(a) (b) Figure Q2(b) shows a MOSFET based current mirror. Draw the AC small signal model and derive an equation for output resistance Rout as shown in the figure. You can keep your answer in terms of gm, ro etc but denote the subscript 1,2,3 etc to indicate which transistor. In other words, denote transconductance of M2 by writing gm2 and so on. [6 marks] (c) Draw the diagram of a BJT based Class B push-pull power amplifier and derive the maximum possible power efficiency of this circuit. You may ignore crossover distortion and assume |VCE(sat)| = 0 V. [9 marks]
Solution
0 0