| 摘要 |
PURPOSE:To reduce insertion loss to connect many television sets, by arranging a hollow cylindrical transformer made of ferrite, used for branching, closely to and in parallel to a printed boared for distributing circuits. CONSTITUTION:A current flowing from an input terminal 5 is branched into a current I1 flowing to an outut terminal 6 and a current I2 flowing to a branch output terminal 12. The current I1 flows through the primary winding 2 of a transformer 4, so a voltage (I2+I3)R0 is induced. This voltage is at the input signal level of a television connected to the terminal 12, but the transformer 4 has a cylindrical flank in close contact with said printed board and its primary winding 2 and secondary winding 3 closely in parallel to the board surface, so insertion loss is reduced over the entire frequency range, increasing the number of television sets which use one antenna. |
