| 摘要 |
PURPOSE:To prevent a distortion on a reproduced screen of a VTR, by eliminating a fluctuation of the output level although the signal to be supplied to a delay element leaks out to the output side. CONSTITUTION:The reproduced video signal supplied to a terminal 1 receives an AM modulation and is supplied to a glass delay line 3. Thus the delay output delayed by a prescribed time and the modulated output are selected by a switching circuit 4. The circuit 4 is switched to the side of the delayed output based on the generation of a skew jump to receive a control so that the interval of the horizontal synchronous signal becomes consecutive at all times. The delay time of a delay element 3 is selected by deciding the phase compensation terms to secure a 90 deg.-difference of the carrier phase between the input side and the output side. |
