- Vo + R R-Ar R opamp R R V1 R R V R - Vs + vo Find the expression for the gain, = f(R, Ar), using an ideal op amp model. vs R. R.
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- Is it possible to get a gain less than unity using a non-inverting amplifier configuration? If yes, sketch a circuit.''please solve it in computer font, not on paper''Please show that gain = -(1-n)/(1+nA) , n = R1/(R1+R2) and compare to gain of ideal op amp. Calculate the input and output impedances, and lastly whats the point of the resistor R1//R2 on the non-inverting input? What would be the best value for this resistor? (pretending it wasn't given that the value is R1/R2).Consider the active circuit with the schematic:a. Assuming it's an ideal op amp, derive the circuit’s transfer function as a function of frequency, H(jw). Make sure it in canonical form.b. We want a DC gain of 40dB. If the op amp has value of Rin = 10MΩ and Rout = 50Ω, choose appropriate values for R1 and R2. Explain why your selected values of R1 and R2 allow you to ignore Rin and Rout for the remainder of the problem. c. If L = 1H, sketch the straight-line approximation of the Bode plot for the circuit’s gain assuming the op amp can still be considered as ideal.d. The op amp you select turns out to be non-ideal, and it has a real pole at wC = 1krad/s. Write the updated transfer function for your circuit (using your values of R1, R2, and L = 1H). Make it in the canonical form.e. Sketch the straight-line approximation of the Bode plot for the circuit with your updated transfer function from D.
- Consider the active circuit with the schematic:a. Assuming it's an ideal op amp, derive the circuit’s transfer function as a function of frequency, H(jw). Make sure it in canonical form.b. We want a DC gain of 40dB. If the op amp has value of Rin = 10MΩ and Rout = 50Ω, choose appropriate values for R1 and R2. Explain why your selected values of R1 and R2 allow you to ignore Rin and Rout for the remainder of the problem.An op amp has a gain of 100 dB at dc and a unity-gain frequency of 5 MHz. What is fB? Write the transfer function for the gain of the op amp.Given circuit, assume op-amp is ideal. What is the input resistance of the circuit, RIN? What are the currents in the inputs of op-amp? i-=? i+=? What is the output resistance of the circuit, ROUT=? Find voltage VA and VB? What is the nodal equation (KCL) at node VB? Solve for VOUT=?
- a) Design a non-inverting amplifier using an ideal op amp that has a gain 7.5.b) If you wish to amplify signals between -2V and 1.2V using the circuit you designed in part (a) what arethe smallest power supply voltages you can use?c) Draw your final circuit diagram.d) Assume that the voltage signal source is vs = −1V and the feedback resistor Rf is replaced with avariable resistor. Specify the range of Rf (in kΩ ) which will cause the op amp to saturate?Consider the active circuit:a. Assuming it's an ideal op amp, derive the circuit’s transfer function as a function of frequency, H(jw) in canonical form.b. We want a DC gain of 40dB. If the op amp has value of Rin = 10MΩ and Rout = 50Ω, choose appropriate values for R1 and R2. Explain why your selected values of R1 and R2 allow you to ignore Rin and Rout for the remainder of the problem.For the op-amp circuit shown below, find the value of vO, where R1 = 19 Ω, R2 = 14 Ω, R3 = 18 Ω, R4 = 14 Ω, Rf = 11 Ω, VS1 = 15 V, and VS2 = 3 V.
- Using the components listed below, design an amplifier having a voltage gain of −10 ± 20 percent. The input impedance is required to be as large as possible (ideally, an open circuit). Remember to use practical resistance values. Cascade a non-inverting stage with an inverting stage.1) Standard 5%-tolerance resistors.2) Standard 1%-tolerance resistors. (Don’t use these if a 5%-tolerance resistor will do, because 1%-tolerance resistors are more expensive.)3) Ideal op-amps.4) Adjustable resistors (trimmers) having maximum values ranging from 100 Ω to 1 MΩ in a 1–2–5 sequence (i.e., 100Ω, 200Ω, 500Ω, 1 kΩ, etc.). Don’t use trimmers if fixed resistors will suffice.For the circuit below, use superposition to find vO in terms of the input voltages v1 and v2. Assume an ideal op amp. v1= 8sin(2??x60t)- 0.1sin(2??x5000t) volts and v2 =8sin(2??x60t) +0.1sin(2??x5000t) voltsThe open-loop gain A of real (nonideal) op-amps isvery large at low frequencies but decreases markedlyas frequency increases. As a result, the closed-loopgain of op-amp circuits can be strongly dependent on frequency. Determine the relationship between a finiteand frequency-dependent open-loop gain AV(OL)(ω)and the closed-loop gain AV(CL)(ω) of an invertingamplifier as a function of frequency. Plot AV(CL)versus ω. Notice that −RF/RS is the low-frequencyclosed-loop gain.