c) A DC amplifier has a single-pole response with a pole frequency of fPD = 2MHz a low-frequency gain of Ao = 50 x 105. The amplifier operates in a closed-loop system with = 0.02. Find the closed- loop low-frequency gain and bandwidth.
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- 40. Given that fc(ol) = 100 Hz, Aol = 50 dB, and fc(cl) = 3 kHz, determine the closed-loop gain in decibels What is the unity-gain bandwidth in Problem 40? 42 to 44. For each amplifier in the Figures shown determine the closed-loop gain, Acl and bandwidth, BWcl. The op-amps in each circuit exhibit an open-loop gain, Aol of 100 dB and a unity-gain bandwidth, fT of 1 MHzFind 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.Design an inverting amplifier to provide a closed-loop voltage gain of Ay = -22 V/V. The maximum input voltage signal is 30 mV with a source resistance in the range of 1 kls R, < 3 kN. The variable source resistance should introduce a difference in the gain no more than a 2% of the gain factor. What is the range in output voltage?
- Q2: (A): What is the advantages and disadvantages of RC coupled amplifier?solve a,b and c please. a. Define on-off ratio. Why series JFET has higher on-off ratio as compared to shunt JFET? b. Compare inverting and non-inverting amplifier? c. calculate the closed loop gain of the circuit diagram given below.The 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?
- For the amplifier shown below, Find the closed-loop gain and the output impedance. Parameters: R1 = 805Ω, R2 = 3kΩ, ro1 = ro2 = 20kΩ, ro3 = ro4 = 10kΩ, gm1 = gm2 = 3.66mS, gm3 = gm4 = 1.95 mS.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)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 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?Find the desired values below in the feedback amplifier circuit in Figure 2.a. Find the no-load voltage gain in the amplifier circuit while the Rf resistance is open circuit. b. Find the voltage and current gain in the amplifier circuit, while the Rf resistance has an open circuit and the RL resistance.c. Find the Rf value that makes the feedback current gain Ai/3 when the Rf feedback resistor is connected. Indicate the assumptions you receive in your transactions. β = 75A certain op-amp is used in a feedback configuration having a gain of 20 and a bandwidth of 500 kHz. a)If the external resistor values are changed to increase the gain to 40, what is the new bandwidth? The new bandwidth is 250khz What is the unity-gain bandwidth of the op-amp ??