| 摘要 |
PURPOSE: A broadband filter of a digital tuner is provided to compensate for discontinuous points and prevent errors due to the discontinuous points by performing a mitered bending process for an edge portion of a pattern inductor. CONSTITUTION: A constant-k portion(110) is connected with an RF input terminal. he constant-k portion(110) is formed with the first pattern inductor(L10), the first air coil(120) connected with the first pattern inductor(L10), the first condenser(C10) connected between the first pattern inductor(L10) and the second pattern inductor(L20), and the second condenser(C20) connected with a rear stage of the second pattern inductor(L20). A m-derived T portion(120) is formed with the third pattern inductor(L30) connected with the rear stage of the second pattern inductor(L20), the third condenser(C30) connected with a rear stage of the third pattern inductor(L30), and the fourth pattern inductor(L40) connected with a rear stage of the third pattern inductor(L30). A bisected-π portion(130) is formed with the fifth pattern inductor(L50) connected between the RF input terminal and the first pattern inductor(L10), the fourth condenser(C40) connected with the fifth pattern inductor(L50), the sixth pattern inductor(L60) connected with the rear stage of the fourth pattern inductor(L40), and the fifth condenser(C50) connected with the sixth pattern inductor(L60).
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