| 摘要 |
PURPOSE:To reduce the number of winding times of a winding and to reduce the insulation of the winding and the reverse voltage resistance of rectifier elements by providing inductance elements connected with the rectifier elements in series between the terminals of the primary and/or tertiary windings in a fly-back transformer which take out a positive polarity pulses. CONSTITUTION:A power source is supplied to the terminal 2 of the primary windings N11, N12 in the fly-back transformer 1 and voltage rectified by a diode D2 is smoothed by a capacitor C1 and supplied from a terminal 7 to a video output circuit. The voltage of the secondary windings N21-N24 is rectified and supplied to a CRT and the voltage of the tertiary windings N31-N33 is rectified by diodes D1, D6, smoothed by capacitors C2, C3 and supplied from terminals 5, 6, 13 to circuits such as the CRT and a tuner. The indactance elements L1, L2 connected with the diodes D2, D1 in series are provided between the terminals of the primary windings N11, N12 and/or the tertiary winding N33 in the transformer 1 which takes out positive polarity pulses and the smoothing capacitors C1, C3 and the values of the indactances L1, L2 are set up so that the high voltage of the windings N21-N24 is increased. |
