| 摘要 |
1. Circuit for eliminating the picture disturbances caused by the demagnetization coil (2) on colour picture tubes (1) in television sets due to unavoidable capacitive and/or inductive coupling (Ca, Cb, Cc, F), in which circuit the demagnetization coil is connected to the mains supply line of the mains switching section (5) and in the mains supply line an LC filter is located, characterized in that LC filters are symmetrically provided in front of and behind the connection (3, 4) of the demagnetization coil (2), in which arrangement the inductivities are accommodated as winding sections (L1, L2, L3, L4), which are identical with each other, on a common coil former and ferrite core (8) and are in each case connected with opposite polarity in centre taps (3, 4) and the demagnetization coil is connected to these centre taps. |
