100, h = 1 K, he %3D %3D %3D For the transistor feedback amplifier shown, he and h = 0. Determine V, where I, R Vo b) Aof Vs c) Rf d) Rof %3D a) A Vcc 10 K 100 K ww R' Vo R 1 K R of ww ww
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- 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?An amplifier has an open-loop voltage gain of 90 dB, Rid = 50 kΩ, and Ro = 5000 Ω. The amplifier is used in a feedback configuration with a resistive feedback network. (a) What is the largest current gain that can be achieved with this feedback amplifier? (b) What is the largest transconductance that can be achieved with this feedback amplifier?For the feedback amplifier circuit shown below, assuming the internal resistor in each MOSFETs is infinite ( ro = ∞ ) and gm1 = gm2 = gm2 = 2.5mA/V. a) Draw the small AC equivalent circuit of the below amplifier. b) Determine the overall voltage gain.
- Find the loop gain, ideal transconductance, actual transconductance, input resistance, and output resistance for the feedback amplifier as shown with RI =15 kΩ, RL =10 kΩ, and R1 =3kΩ.2-) The AC equivalent of a feedback amplifier circuit is given in the figure on the right. (Hfe100, Va = ∞, Ic1 = 15 mA, Ic2 = 5mA and Ic3 = 5 mA) a) State the type of feedback used in the circuit, explaining the reason. b) Draw the small signal equivalent of the amplifier circuit. c) Calculate the value of β for the feedback by drawing the β circuit. d) Find the Avf = Vo / Vs closed loop gain of this circuit. e) Find the Rif and Rof values.Find the loop gain, ideal current gain, actual current gain, input resistance, and output resistance for the feedback amplifier shown with RI = 150 kΩ, RL = 5k Ω, R1 = 10 kΩ and R 2 =1kΩ.
- 2. Design a unity gain inverting summing amplifier that will output the sum of two input voltages. Use a feedback resistor of 2.5 Kohms.An amplifier has an open-loop gain of 92 dB, Rid = 75 kΩ, and Ro = 1400Ω. The amplifier is used in a feedback amplifier configuration with a resistive feedback network. (a) What is the largest value of current gain that can be achieved with this feedback amplifier? (b) What is the largest valuetransconductance that can be achieved with this feedback amplifier?Consider the following statement: In feedback amplifiers, concerning the connections between the direct amplifiers and the feedbacks network, a shunt connectiın at the input part servers to set an increased versiın of the input impedance of the direct amplifier, whereas again a shunt connection at the output part services to set a decreased version of the output imdepance of direct amplifier. Explain what is wrong with the statement above by drawing representative circuit diagrams and outlining the necessary calculations.
- 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 = 75The feedback amplifier shown has R1 = 1kΩ, R2 = 100 kΩ, RI = 0, and RL = 10 kΩ. (a) What is β? (b) If A =92 dB, what are the loop gain T and the closed loop gain Av? (c) What are the values of GE and FGE?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.