For the FET amplifier shown: given FET parameters gm-0.2s, ra=10kQ, R, 1k2, and Rg-500kQ, (i) determine the Feedback topology, (ii) calculate A, B, D, A, and Avf.
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- (a) Calculate the poles at the base of Q2, the base of Q5, the collector of Q5, and the emitter of Q6 for the amplifier of (a) with CC = 0. Use fT = 300 MHz and Cμ = 1 pF in addition to the bias parameters (b) Calculate the gain of the amplifier with VA = 50 V and βo = 100. (c) Assuming a unity-gain feedback connection, calculate the phase margin of the amplifier. (d) What value of CC is necessary to set the phase margin at 75◦?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 amplifierThe 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?
- A certain operational amplifier has an open-loop gain of 50 V/mV at low frequencies (note carefully the units of the gain value), with negligible phase shift and gain variation from d.c. to a maximum of 15 MHz. Above 15 MHz, the gain is reduced and the phase shift becomes very large and significant. (i) What is the amplifier gain at low frequencies expressed in dB? (ii) What is the –3dB frequency (or “break frequency”) of the compensation that should be added to make this operational amplifier unconditionally stable when connected to any passive negative feedback network having a phase shift magnitude of up to 90° maximum? (iii) What is the maximum gain-bandwidth product of an amplifier circuit constructed using this operational amplifier with the frequency compensation that you specified in part (i) of this question?a. What is the DC gain of this amplifier? (in dB)b. Where is the input pole frequency located? (in Mrad/sec)c. Where is the output pole frequency located? (in Mrad/sec)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.
- A amplifier’s closed-loop voltage gain Av is described by Eq. as shown. What is the minimum value of loop gain T required if the gain error is to be less than 0.2 percent for an ideal gain of 50 dB?Derive an expression for the gain Vo/Vs = f(R,△r) by the usage of an ideal operational amplifier model.Find the desired values below in the feedback amplifier circuit in the figure. a) Find the no-load voltage gain in the amplifier circuit when the Rf resistor is open circuit. b) Voltage and current in amplifier circuit when Rf resistor is open circuit and RL resistor is present Find your earnings. c) When the Rf feedback resistor is connected, the Rf value that makes the feedback current gain Ai/3 find it. Indicate the assumptions you take in your transactions.
- Find the loop gain, ideal transresistance, actual transresistance, input resistance, and output resistance for the feedback amplifier shown with RI =100kΩ, RL =15kΩ, and RF =10kΩ.Consider the operational amplifier circuit shown below. Assume the operational amplifier in the circuit is ideal. Determine the expression for the output signal, Vout, in terms of Vin,R1 and R2. Given the expression of the circuit [above’s output signal is Vout =3 − 0.5Vin, what is the maximum and minimum voltage that the input signal can have before the operational amplifier saturates.If a signal voltage of 30mV is applied to inverting amplifier, find output voltage and phase relationship with input voltage if it has input resistance of 25 ohm and feedback resistance of 50 ohm. NOTE : KINDLY ELABORATE BRIEFLY