3. Consider the integrating operational amplifier circuit. The input resistor is 90 ko, the feedback capacitor is 20 uF, and the voltage across the input is constant at -3 V. Calculate the output voltages of the amplifier for each second after the input voltage has been applied, up to 5 seconds. From this draw a graph of output voltage against time and compare this to the input voltage.
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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 amplifierIf 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 BRIEFLYThe 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?
- 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.Slove Foperational amplifiers of your choice both FET and BJT based technologyA) From the datasheet, find the number of pins of the Op-amp IC, the open-loop gain,bandwidth, CMRR, slew rate, Voltage offset, current offset, input and output impedance,recommended supply voltages. Tabulate your outcomes with evidence from the data sheets.For both types of Op-Amps. Discus advantages and disadvantages of both.B) Mention available amplifiers that this op-amp is used for and discuss in brief itsapplications.C) Build a simple differentiator circuit, having C=1µF and R = 1kΩ for the op-amp chosen in(A), virtual using Multisim. Evaluate the voltage saturation, compare your findings with bothtypes of op-amps (FET and BJT) and analyze briefly how you concluded your result.D) Build a simple non-inverting amplifier with a gain of 10V/V circuit, using the op-ampchosen in (A) either BJT or FET, virtual using Multisim. Evaluate the slew rate, and theamplifier specification in terms of conduction angle…a) What is the input impedance of an inverting amplifier circuit? What is the input impedance of a non-inverting amplifier circuit? b) What is the formula for the gain of an inverting operational amplifier circuit with input resistor Ri and feedback resistor Rf? Draw the circuit. c) What is the formula for the gain of a non-inverting operational amplifier circuit with input resistor Ri and feedback resistor Rf? Draw the circuit.
- 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?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.A certain amplifier has an open-circuit voltage gain of unity, an input resistance of 1 MΩ and an output resistance of 100 Ω. The signal source has an internal voltage of 5 V rms and an internal resistance of 100 kΩ. The load resistance is 50 Ω. If the signal source is connected to the amplifier input terminals and the load is connected to the output terminals, find the voltage across the load and the power delivered to the load. Next, consider connecting the load directly across the signal source without the amplifier, and again find the load voltage and power. Compare the results. What do you conclude about the usefulness of a unity-gain amplifier in delivering signal power to a load?
- A voltage follower’s closed-loop voltage gain Av is described by Eq. as shown. (a) What is the minimum value of loop gain T required if the gain error is to be less than 0.02 percent for a voltage follower?(b) What value of open-loop gain A is required in the amplifier?(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◦?An op amp has a dc gain of 100 dB and a unity-gain frequency of 10 MHz. (a) What is the bandwidth of the op amp? (b) If the op amp is used to build a noninverting amplifier with a closed loop gain of 60 dB, what is the bandwidth of the feedback amplifier? (c) Write an expression for the transfer function of the op amp. (d) Write an expression for the transfer function of the noninverting amplifier.