For the amplifier circuit shown, determine the current gain Ai = lo/Ils using ideal feedback equation. 0.1mA De current source 20KO Volt 01 2KO lo(t) 1KO 1mA Ist) 0.1KO De current source hfel = hfe2 = 100, hiel =30KQ , and hie2 = 1.5KO
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- 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.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.
- 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.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?Find the unity-gain bandwidth of an op-amp that has a critical frequency of 10Hz and voltage differential gain AVD=100V/mV. Choices: a) 100kHz, b) 1MHz, c) 10MHz, and d) 10kHz A LM124 quad op-amp has a three-stage amplifier with gains of +15(non-inverting), -22(inverting), and -30(inverting). Use a 420-kohms feedback resistor for all stages. Determine the output voltage results for an input of V1=100uV.
- (a) There are three voltage inputs of V1 = 1V, V2 = 3V and V3 = 4V, and three resistors with the value of 4kΩ, 2kΩ and 1kΩ. Design a single ideal operational amplifier circuit to combine these inputs to produce a single output voltage of Vout = -10.5v with a feedback resistor of Rf = 2kΩ. Provide the sketch and calculation for your designed circuit. (b) Figure 2 below shows a cascaded operational amplifier circuit. Determined the value of the output voltage Vout. (c) Figure 3 shows a bipolar junction transistor circuit in common-emitter configuration. Given that VBE = 0.7 v and ß = 110. Determine the current IB, IC, IE and the voltage VCE.(a) There are three voltage inputs of V1 = 1V, V2 = 3V and V3 = 4V, and three resistors with the value of 4kΩ, 2kΩ and 1kΩ. Design a single ideal operational amplifier circuit to combine these inputs to produce a single output voltage of Vout = -10.5v with a feedback resistor of Rf = 2kΩ. Provide the sketch and calculation for your designed circuit. (b) Figure 2 below shows a cascaded operational amplifier circuit. Determined the value of the output voltage Vout. (c) Figure 3 shows a bipolar junction transistor circuit in common-emitter configuration. Given that VBE = 0.7 v and ß = 110. Determine the current IB, IC, IE and the voltage VCE. [9 Marks]Feedback:2. An ideal series-shunt feedback amplifier has Rs negligibly small. If Vi = 100mV, Vfb =99mV, and Vo= 5V determine:a. Av , β, Avf (including the units)b. Rif, Rof if Ri = 5 Kohm & Ro = 4 Kohm.
- The voltage gain of an amplifier is described by A(s) = 2π ×1010s /(s+2000π)(s+2π ×106) (a) What are the mid-band gain and upper- and lower-cutoff frequencies of this amplifier? (b) If this amplifier is used in a feedback amplifier with a closed-loop gain of 100, what are the upper-and lower-cutoff frequencies of the closed-loop amplifier? (c) Repeat for a closed-loop gain of 40.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)Suppose we have a voltage source v(t)=Vdc+Vm cos(ωt) connected to the input terminals of an amplifier. The load is a nonlinear device such as an LED. a. What output impedance is needed for the amplifier if we need the current through the load to be proportional to v(t)? b. If we need the voltage across the load to be proportional to v(t)?