Title :
Noise in Current-Commutating Passive FET Mixers
Author :
Chehrazi, Saeed ; Mirzaei, Ahmad ; Abidi, Asad A.
Author_Institution :
Marvell Semicond. Inc., Santa Clara, CA, USA
Abstract :
Noise in the mixer of zero-IF receivers can compromise the overall receiver sensitivity. The evolution of a passive CMOS mixer based on the knowledge of the physical mechanisms of noise in an active mixer is explained. Qualitative physical models that simply explain the frequency translation of both the flicker and white noise of different FETs in the mixer have been developed. Derived equations have been verified by simulations, and mixer optimization has been explained.
Keywords :
CMOS integrated circuits; field effect transistor circuits; flicker noise; mixers (circuits); radio receivers; white noise; active mixer; current-commutating passive FET mixer; flicker noise; passive CMOS mixer; white noise; zero-IF receiver; Flicker noise; passive mixer; physical mechanism; white noise; zero-IF;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2009.2023762
