Figure below shows a negative feedback system. The open loop gains of amplifiers are given as follow: 25 18 20 A,(f) = A2 (f) A3 (f) = 1 +j 5000 1 + j 5000 1 + j 5000 Si A1 A2 Аз S. Determine phase margin if the low-frequency closed-loop gain, A10) = 1500.

Figure below shows a negative feedback system. The open loop gains of amplifiers are given as follow: 25 18 20 A,(f) = A2 (f) A3 (f) = 1 +j 5000 1 + j 5000 1 + j 5000 Si A1 A2 Аз S. Determine phase margin if the low-frequency closed-loop gain, A10) = 1500.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter11: Thermostats, Pressure Switches, And Other Electric Control Devices

Section: Chapter Questions

Problem 23RQ

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Concept explainers

Differential amplifier

There are two amplifying stages with common degeneration in a differential amplifier.

Question

Figure below shows a negative feedback system. The open loop gains of
amplifiers are given as follow:
25
18
20
A,(f) =
A2 (f)
A3 (f) =
1 +j
5000
1 + j
5000
1 + j
5000
Si
A1
A2
Аз
S.
Determine phase margin if the low-frequency closed-loop gain, A10) = 1500.

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