This 'fringing field' passes the E shaped LF magnetic 

 circuit and induces a positive voltage in the Hall 

 sensors and then a negative voltage. This is illustrated 

 in Fig. 3. 4 (a) - (d) 



Fig. 3.3 Dipole & fringing field created by 

 broken wire 



dl 



WW 



Fig. 3.4(a) Dipole fringing field before entering 

 LF section. 



A- 9 



