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Chapter 12, Problem 12.77P A feedback system has an amplifier with a low-frequency open-loop gain of 5 × 104 and has poles at 103 Hz, 105 Hz, and 107Hz (a) Determine the frequency f180 at which the phase of the loop gain is 180 degrees. (b) Determine the feedback transfer function ẞ for which the phase margin of the system is 45°. (c) Using the results of part (b), determine the low-frequency closed-loop gain. SAVE ☐

Chapter 12, Problem 12.77P A feedback system has an amplifier with a low-frequency open-loop gain of 5 × 104 and has poles at 103 Hz, 105 Hz, and 107Hz (a) Determine the frequency f180 at which the phase of the loop gain is 180 degrees. (b) Determine the feedback transfer function ẞ for which the phase margin of the system is 45°. (c) Using the results of part (b), determine the low-frequency closed-loop gain. SAVE ☐

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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I need help understanding part B. See attached photo.

Chapter 12, Problem 12.77P A feedback system has an amplifier with a low-frequency open-loop gain of 5 × 104 and has poles at 103 Hz, 105 Hz, and 107Hz (a) Determine the frequency f180 at which the phase of the loop gain is 180 degrees. (b) Determine the feedback transfer function ẞ for which the phase margin of the system is 45°. (c) Using the results of part (b), determine the low-frequency closed-loop gain. SAVE ☐
Transcribed Image Text:Chapter 12, Problem 12.77P A feedback system has an amplifier with a low-frequency open-loop gain of 5 × 104 and has poles at 103 Hz, 105 Hz, and 107Hz (a) Determine the frequency f180 at which the phase of the loop gain is 180 degrees. (b) Determine the feedback transfer function ẞ for which the phase margin of the system is 45°. (c) Using the results of part (b), determine the low-frequency closed-loop gain. SAVE ☐
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