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- Given the feedback circuit below and assuming the voltage amplifier has gain A₂, input resistance R₁ and output resistance Ro, answer the following questions: + a. Loop gain b. Closed loop gain Re C. Input resistance d. Output resistance Rin м + RE A) Sketch the feedback small signal model of this circuit. (Hint: You may convert the input VIN and source resistance Rs to its Norton current equivalent if needed) B) Find the following in terms of the amplifier parameters and resistances R, and RF: Rout2-) The AC equivalent of a feedback amplifier circuit is given in the figure on the right. (Hfe100, Va = ∞, Ic1 = 15 mA, Ic2 = 5mA and Ic3 = 5 mA) a) State the type of feedback used in the circuit, explaining the reason. b) Draw the small signal equivalent of the amplifier circuit. c) Calculate the value of β for the feedback by drawing the β circuit. d) Find the Avf = Vo / Vs closed loop gain of this circuit. e) Find the Rif and Rof values.Q2: For the unity feedback second order system shown below, if R(s) is a unit step, trace R(s), E(s) and C(s). Take a. K=50 and kl=10 b. K=k1=10 c. K=25 and kl=10. Comment on the results in each case. R(s) E(s) K. C(s) (s +. kl)s
- Q1 Design an operational-amplifier circuit using two inverting configurations to produce the output vo = +201 + 0.5v2 – 0.2v3 – 1v4. Choose feedback resistor Rf = 220kN for each amplifier. %3D | -Consider the series-shunt feedback amplifier of Figure below. Assume that the voltage divider (R1, R2) is implemented with a 1-MQ potentiometer. Assume that the MOSFET is biased so that gm 4 mA/V and r, is large. Also, Rp = 10 k. A VDD Find the value of R1 that results in a closed-loop gain of 5 V/V. Rp R2 R1 V,Given the following values and shunt-series feedback circuit below, answer the following question: The open loop input resistance of the circuit is: A. 441.18 Ω B. 3035.71 Ω C. 3125 Ω D. 500 Ω
- Given the feedback circuit below: V, 0- RE Rei m Q₁ a Vcc 2₂ m Rc₂ RF Q3 -o V₂ Find the following in terms of the BJT parameters and resistances RE and RF: a. Loop gain b. Closed loop gain c. Input resistance d. Output resistance Note: Assume that B = ∞ and V₂ = ∞ for all BJTS and the current source is ideal.(2) ukäi Q) In the negative feedback, which of the following * .statement is true (a) Gain, noise, distortion as well as the bandwidth of the amplifier are decreases. (b) The feedback is out of phase with their input signal and the the gain stability decreases. (c) It is called regenerative and used in amplifiers. (d) The input voltage is reduced and the input and output impedances are improved.Given the following values and shunt-series feedback circuit below, answer the following question: The open-loop gain of the circuit is: A. 7.5 S B. -17850 C. 28125 D. −70312500 Ω
- Assume for a moment that perfectly accurate resistors were available for feedback networks; that is resistor tolerance is 0%. Then any deviation from the value set by the feedback resistor ratio is caused by insufficient raw op-amp gain. What minimum raw gain would be needed to get within 1% if an intended overall gain of 10? What if the intended gain is 100 instead?Plz solve both , i vll share positive feedback and vll upvote.... ASAP PLZZQ1: design an inverting op-amp circuit to form the weighted sum Vo = -(v1 + 4v2) .choose the values for R1, R2, and Rf so that for a maximum output voltage of 10 volt the current in the feedback resistor will not exceed 1 ma.