A zero is somehow introduced into the amplifier of Problem 5.8 so that A s XXXXXXXXXXs ωz ( ) + ⁄ 1 s 104 ( ) + ⁄ 1 s 107 ( ) a. What is the approximate phase margin if this amplifier is to be used...

A zero is somehow introduced into the amplifier of Problem 5.8 so that

A s( ) 103 1 s ωz ( ) + ⁄ 1 s 104 ( ) + ⁄ 1 s 107 ( )

a. What is the approximate phase margin if this amplifier is to be used with feedback to realize a closed-loop amplifier with a gain of 10 and ?

b. Repeat part (a) with ?

c. What can you conclude about the impact of a left-half plane and right-half plane zeros on the stability of feedback systems?