5555555555 68. Determine the input impedance with feedback for a voltage-series feedback having A = –100, R1 = 15 kΩ, Ro = 20 kΩ, and a feedback of β = –0.25. (a) 110 kΩ (b) 290 kΩ (c) 390 kΩ (d) 510 kΩ
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
555555555590. Negative feedback results in ________. (a) decreased voltage gain (b) increased voltage gain (c) oscillation in the circuit (d) None of the above
Tags: voltage, gain, oscillators, feedback, electronics, engineering