Deriving Phase response from Group Delay

Status
Not open for further replies.
N

nightmaresc

Newbie level 3
Joined
Aug 11, 2014
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
5
Hi,
Assume I have a constant group delay of 1 second for all frequencies then I can determine the phase response to be: phase(f)=C - 2*pi* \[\int\]tau df where tau is the delay of 1 second. How do I determine the constant C which is the phase response at zero frequency?
 

Your assumption is invalid at DC as there is no phase. There are limits for your given formula.

Realistically, C is negligble as f approaches DC and represents a unknown phase at any known frequency and group delay.
 
Thank you for the insight.

Is there any other way to determine phase response given group delay?

Another question I have is that for a filter that gives non linear phase response phase delay and group delay are generally different while for linear phase response group delay and phase delay are equal to each other. Which one is used to derive non linear phase response? Group delay or Phase delay?
 

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…