| 摘要 |
PURPOSE:To reduce equivalently the crosstalk between channels of a rotary transformer by processing signals. CONSTITUTION:The video and sound signals SV and FA are added by resistances RVA and RAA, and this addition signal SV+FA is supplied to an input terminal at the negative pole side via a resistance RBA. Then a signal SV+FA- xFB is supplied to a coil 31A of a rotary transformer 30A. At the same time a signal SV+FB-xFA is supplied to a coil 31B. Here (x) means the crosstalk ratio between rotary transformers 30A and 30B. Both transformers are connecting in the same polarity. Therefore the signal leaked out from 30B to 30A is shown as x(SV+FB-xFA); while the signal leaked out from 30A to 30B is shown as x(SV+FA-xFB) respectively. Then signals (1+x)SV+(1-x<2>)FA and (1+x)SV+ (1-x<2>)FB are supplied to rotary heads 40A and 40B respectively. Thus the crosstalks between channels of transformers 30A and 30B can be eliminated by the signals applied to the heads 40A and 40B. |
