Title :
General relations between IP2, IP3, and offsets in differential circuits and the effects of feedback
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA
fDate :
5/1/2003 12:00:00 AM
Abstract :
In the presence of offsets, all balanced circuits show an apparent second-order distortion. Differential feedback lowers third-order nonlinearity and also these second-order effects. The results are important for the baseband circuits of zero-IF wireless receivers, which often need a very large second-order intercept point. It is shown that a published analysis of distortion in a bipolar double-balanced mixer is a special case of these general relationships.
Keywords :
circuit feedback; differential amplifiers; distortion; microwave circuits; microwave mixers; IP2; IP3; apparent second-order distortion; balanced circuits; baseband circuits; bipolar double-balanced mixer; differential circuits; differential feedback; feedback; offsets; second-order effects; second-order intercept point; third-order nonlinearity; zero-IF wireless receivers; Active filters; Baseband; Displays; FETs; Feedback circuits; Nonlinear circuits; Nonlinear distortion; Passband; Threshold voltage; Transconductors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.810147
