Applications of Coaxial Chokes to A-C Bridge Circuits

One or more lurn s of coaxi a l cab le on a magnelic core form a coaxial c hoke which may be used to suppress unwa nted loop c urre nl s in a-c bridge c irc uil s. A re vie w of seve ra l app licaliuns of coaxial chokes to a-c bridge c irc uit s is present ed. T hese appl icat ion s in c lude s up press ing ground loop c urrent s, assurin g uniqu e de finiti on in the measure me nl o f s mall 3te rrnina l ca pac it o rs, redu cing s tray magnetic fi e ld a nd reducing voltage d ro ps in leads ca used by la rge ground ca pac itance curre nt. The re is a lso a d iscuss ion of techniques fo r grea tl y inc reas ing the e ffec tiveness of the coaxia l choke.