Consider a unity feedback system having an open-loop transfer

Consider a unity feedback system having an open-loop transfer function
G(jω) = K
jω (j 0.2 ω + 1)(j 0.05 ω + 1)

For K = 1, GM = 28 dB. When GM at 20 dB, K will be equal to______

For a GM of 20 db, the Nyquist plot should intersect the real axis at a,

where, 20 log		1		= 20
		a

⇒ a = 0.1

This is achieved if the system gain is increased by a factor of		0.1		= 2.5
		0.04

Thus K = 2.5

G(jω) =	K
	jω (j 0.2 ω + 1)(j 0.05 ω + 1)