defining the 3rd intercept point for an amplifier

[mikeedwards]

Hello,
I am after information regarding defining the 3rd intercept point for an amplifier I am designing. I understand how to test it using two frequencies but don't know if there is a way I can specify it for design purposes based on some calculated values. i.e. I wish to specify a target value for a design specification. Any information would be much appreciated.


Mike

 

There is a wealth of information available by way of a google search.

http://www.google.com

and then enter...

third order intercept point

You probably already know that this parameter is an extrapolation and is not directly measureable. In most cases you would "fry" the Unit Under Test (UUT) input long before you put in sufficient power to reach the TOIP. An example would be a cute little MMIC amplifier with a TOIP of +40dBm (10 watts - YIKES!).

Have a good day.

J. Harvey
Ottawa

 

Specifically:

http://www.matrixtest.com/Literat/mtn109.htm

This one -^ seems to answer your specific question.

 

[jbartos]

Suggestion: Visit

http://www.its.bldrdoc.gov/fs-1045a/45-defs.htm

http://www.mpdigest.com/articles/july2001/mini/

http://www.wellbrook.uk.com/intermod.html

etc. for more info