| 摘要 |
PURPOSE:To reduce the number of parts by excluding a delay line by incorporating a surface elastic wave filter, which advances the phase of a color signal band in comparison with a luminance signal band, in an amplifying-detecting circuit. CONSTITUTION:The surface elastic wave filter is built in VIF amplifying-detecting circuit 3 and the output of video buffer amplifying circuit 4 advances the phase of the color signal band in comparison with the luminance signal band. Therefore, the output signal of luminance signal system circuit group 5 can be put in phase with the output signal of color signal system circuit group 6. |
