Factor Xa is the activated form of the coagulation factor thrombokinase, known eponymously as Stuart-Prower factor. Factor X is an enzyme, a serine endopeptidase, which plays a key role at several stages of the coagulation system. Factor X is synthesized in the liver.
Common-mode (CM) chokes are four-terminal devices with different CM and differential-mode (DM) characteristics. The paper reviews the models for two- and four-terminal inductors and presents two. methods to obtain the CM and DM characteristics of four-terminal devices. More specifically, it shows.
Merge 2007[edit] It may not be a good idea to merge the choke article with the ferrite bead article. From what I understand, a choke can consist of a ferrite bead, but it could also simply be an inductor. The difference is that a ferrite bead has a real component in addition to a reactive component at high frequencies, whereas an inductor is (theoretically) purely reactive.