Oscillators – 68

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68. Determine the input impedance with feedback for a voltage-series feedback having A = –100, R₁ = 15 kΩ, R_o = 20 kΩ, and a feedback of β = –0.25.

(a) 110 kΩ
(b) 290 kΩ
(c) 390 kΩ
(d) 510 kΩ

Answer

Answer : (c)

Explanation

Explanation : No answer description available for this question. Let us discuss.

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Oscillators - 69
5555555555 69. Determine the voltage gain with feedback for a voltage-series feedback having A = –100, R1 = 15 kΩ, R0 = 20 kΩ, and a feedback of β = –0.25. (a) 3.85 (b) –3.85 (c) –9.09 (d) 9.09
Tags: feedback, kω, oscillators, determine, voltage-series, β, electronics, engineering
Oscillators - 74
5555555555 74. Determine the output impedance with feedback for a voltage-series feedback having A = –100, R1 = 15 kΩ, R0 = 20 kΩ, and a feedback of β = –0.25. (a) 0.2 kΩ (b) 392.16 Ω (c) 1.82 kΩ (d) 769.23 Ω
Tags: kω, feedback, oscillators, determine, impedance, voltage-series, β, electronics, engineering
Oscillators - 60
5555555555 60. What is the ratio of the input impedance with series feedback to that without feedback? (a) 1 + βA (b) βA (c) β (d) 1
Tags: feedback, oscillators, input, impedance, β, electronics, engineering
Oscillators - 62
555555555562. Which of the following is (are) feedback? (a) Voltage-series (b) Voltage-shunt (c) Current-series (d) All of the above
Tags: oscillators, feedback, voltage-series, electronics, engineering
Amplifiers - 20
Amplifiers » Exercise - 120. The value of negative feedback fraction is always .......... (a) less than 1 (b) more than 1 (c) equal to 1 (d) none of the above
Tags: feedback, electronics, engineering

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