Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 8 (Q.No. 3)
3.
The open loop transfer function of a unity feedback control system is given as 
The phase cross over frequency and the gain margin are respectively.
The phase cross over frequency and the gain margin are respectively.
and 
and and 
and Answer: Option
Explanation:
At phase cross over frequency
-90° - tan- 1 ωT1 - tan- 1 ωcT2 = - p
= 90°
GM = 1/a where a = | G(jω)|ω=ωc
.
Discussion:
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