| 摘要 |
PROBLEM TO BE SOLVED: To obtain desired characteristics in a high area of a frequency band in using. SOLUTION: A wide-band television broadcasting signal is inputted from an input terminal 20 to the input side of a variable attenuator 53 including PIN diodes 24, 26, 34, 36. The output side of the variable attenuator 53 is connected to an output terminal 30. An anode of the PIN diode 36 which is a common potential point side of the variable attenuator 53 is connected to an LC parallel resonance circuit 54 through a DC interrupting capacitor 52. The resonance frequency of the parallel resonance circuit 54 is selected to a required frequency of the high frequency side of the television broadcasting signal. COPYRIGHT: (C)2007,JPO&INPIT
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