03 (a) Consider an operational amplifier circuit in current-series feedback configuration with these parameters: Ω Ay = 12.5, A = 375, Zof = 252, Z₁ = 500 Determine the input impedance with feedback (Zir), output impedance (Zo) and attenuation (B) of this circuit.
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- Given in the figure is a two-stage amplifier design that employs negative feedback. Answer the following questions. Use the notation (R1 + R2 + ... + Rn) for series resistors and (R1 || R2 || ... || Rn) for parallel resistors for clarity and ease. Assume that the transistors are already biased properly in the saturation region and ro1 = ro2 → ∞. Also assume that the capacitors have infinite capacitance. 1.) Find the expression for the open loop gain Av 2.) Derive the resistance Rin which is the resistance that can be seen at the input port of the amplifierQuestion 3: Please write answers to all parts of the question in the separate dot points as shown What is the circuit called? Discuss all components including voltage sources. Which components determine the closed-loop gain of the circuit? Describe the slew-rate of the op-amp. Describe the Common-Mode-Rejection ratio of the op-amp? What is the unity gain bandwidth? Describe the gain bandwidth product (GBP). Describe the GBP relationship between the break (critical) frequency and the gain? What two methods calculate the max frequency? If one produces a higher value of maximum frequency than the other, which would you use as the maximum frequency?1. Given the operational amplifier below.a. Solve for the input voltage, if the feedback resistors value is 10kOhm, and input resistance is 2kOhms and has an output voltage of -3V.b. Determine the input impedance of the given amplifier if the open-loop input impedance is 1MΩ
- A unity-feedback system has forward transfer function (see attached). a) Sketch the root locus for this system as K varies from 0 to ∞; b) Use the Routh-Hurwitz test to determine the range of K for the system to be stable; show this value of K on the root locus plot.Consider the following statement: In feedback amplifiers, concerning the connections between the direct amplifiers and the feedbacks network, a shunt connectiın at the input part servers to set an increased versiın of the input impedance of the direct amplifier, whereas again a shunt connection at the output part services to set a decreased version of the output imdepance of direct amplifier. Explain what is wrong with the statement above by drawing representative circuit diagrams and outlining the necessary calculations.A. If the forward gain is 5 and feedback gain is 1, determine the close-loop gain of a negative feedback amplifier. answer: B. For a Wien-bridge oscillator (as presented in the lecture), if the feedback resistor has a value of 10-kohm, determine the value of Ri (in kilo-ohm). answer:
- Given the following amplifier with feedback circuits A, B, C and D shown below... Assuming circuits A and C share the same feedback topology, determine their feedback topology. Assuming circuits B and D share the same feedback topology, determine their feedback topology. Determine whether each circuit utilizes positive or negative feedback. Note: For questions asking for feedback topology, answers can only be shunt-shunt, shunt-series, series-series or series-shuntThe circuit as shown is a shunt-shunt feedback amplifier. Use feedback analysis to find the midband input resistance, output resistance, and transresistance of the amplifier if RI = 500 Ω, RE = 2 kΩ, β0 = 100, VA = 50 V, RL = 5.6 kΩ, and RF = 47 kΩ, when vi and RI are replaced by a Norton equivalent circuit. What is the voltage gain for the circuit as drawn?Compare the closed-loop voltage gain, k = Vo/Vs, for the loaded and unloaded dependent source model of the Voltage Follower with the ideal model of the Voltage to examine the impact of the load, RL on k. - Using any circuit analysis method, derive expressions for the closed-loop gain, k = Vo/Vs, for the ideal opamp Voltage Follower ,both the unloaded ,loaded Voltage Follower using the dependent source model. simplify both of the closed-loop gain expressions for the dependent source models by applying the ideal opamp parameters: A --> infinity , R_i -->infinity and R_0 --> infinity.
- The transistor parameters for the circuit shown are VTN = 0.4 V, Kn =0.5 mA/V2, and λ = 0.(a) Discuss the feedback topology, show the input ant output connections (series orshunt)(b) Find the feedback factor β (find the transfer function without feedback first)Find the loop gain, ideal transconductance, actual transconductance, input resistance, and output resistance for the feedback amplifier as shown with RI =15 kΩ, RL =20 kΩ, and R1 =6kΩ.2. Design a unity gain inverting summing amplifier that will output the sum of two input voltages. Use a feedback resistor of 2.5 Kohms.