| 摘要 |
PURPOSE:To perform the separation of an interpolated multiplex signal over a wide variety of band, by providing a plurality of stages of LC type delay lines in parallel with comb-type filters including an ultrasonic wave solidstate delay line. CONSTITUTION:Coils L for a plurality of stages of LC type delay lines 24 are inserted to an input transducer of the delay line of a comb type filter in parallel, and parts between the coils L are grounded via a capacitor. Further, in the frequency range where an ultrasonic wave delay line, e.g., glass delay line is in operation, the signal passing through the glass delay line 21 and the signal fed to a voltage dividing load 24 are synthesized at the output transducer to constitute a comb type filter, allowing to separate the video signals of broad band without phase shift. |
