| 摘要 |
PURPOSE:To prevent cross talk due to overlapping of both heads, by alternately shortening the secondary side of a rotary transformer with a head switch pulse. CONSTITUTION:Switch circuits 13, 14 are alternately switched based on a head switch pulse applied to an input terminal 18 and an inverting output of a phase inverter 19 and signals of an odd and an even number of fileds can sequentially be switched and reproduced. Simultaneously, transistors 20 and 21 are turned on and off in synchronizing with the timing of head changeover, based on the head switch pulse and its inverted output and the output of rotary transformers 9 and 10 is alternately shortened, allowing to prevent cross talk from being generated. |
