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.
A good choke has >> 1 kÎ© impedance for all. MF and HF bands and costs $12 (for a small cable) to $120 (for a large, QRO cable). QRO common-mode choke for RG-213/U, made with eight ferrite toroids costing. $5 ea. Its impedance is >1 kÎ© from 1.8 to 18 MHz and 550 Ï at 30 MHz.