pole is where the transfer function tends to infinite but bode plot magnitude respons

Status
Not open for further replies.
P

pankaj jha

Full Member level 3
Joined
Apr 16, 2010
Messages
170
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Location
jaipur
Visit site
Activity points
2,457
Hi all!!
Generally a pole is defined as the frequency where the transfer function tends to infinite. But when we do the bode plot, of the transfer function, the magnitude response it drops by 20db/decade (does not go to infinite).
What is the confusion...????:bang::bang::bang:
 

As I recall the negative feedback loop may have zeros, but the transfer function of P(s)/Q(s) for the positive input is often 1/(1+H(s)) thus the overall gain never reaches zero unless H(s) =-1
 

Generally a pole is defined as the frequency where the transfer function tends to infinite.
Click to expand...
Nope. Presumes that the poles are real frequency values. The poles of useful electronic circuits with stable transfer function are complex or pure imaginary.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…