公开(公告)号：CA2074892A1

公开(公告)日：1993-03-03

申请号：CA2074892

申请日：1992-07-29

Applicant: IBM

Inventor： DYE MALCOM ,  GIBBS TERENCE K ,  MERCER IAN D ,  LUCK GRAHAM

IPC: G09G1/00 ,  G09G1/16 ,  H01F29/14 ,  H01F38/02 ,  H01J29/76 ,  H04N3/16 ,  H04N3/237 ,  H04N9/28 ,  G09G1/04

Abstract: UK9-91-044 A non-linear inductor for a CRT line timebase circuit comprises a bobbin 40 carrying an inductive coil 41 and a first permanent magnet 42 adjacent the coil 41. A second permanent magnet 200 is positioned and oriented relative to the first magnet 42 in such a manner that the magnetic field generated by the non-linear inductor is substantially reduced. Because the second magnet 200 is integral, the non linear inductor occupies the same printed circuit board area as a conventional non linear inductor. Furthermore, because the second magnet 200 is oriented to substantially cancel the magnetic field, no additional magnets are required for deflecting the magnet field away from the CRT.