JPS5939533U - electric filter - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本案を適用した４５５ｋＨ２用梯子型電気濾波
器を示し、Ａは要部を切欠した平面図、ＢはＡ図イーイ
線に沿う正面断面図、第２図は梯子型濾波回路、第３図
は本案のイと従来の濾波特性口や比較して示す特性図で
ある。 １・・・絶縁ケース、２．３・・・圧電共振子、４・・
・端子板、９・・・導電膜、Ｐ・・・濾波回路構成要素
。Figure 1 shows a ladder-type electric filter for 455kHz2 to which the present invention is applied, A is a plan view with the main parts cut away, B is a front sectional view taken along line E in Figure A, and Figure 2 is a ladder-type filter circuit, Figure 3 is a characteristic diagram comparing the filtering characteristics of the present invention and the conventional filtering characteristics. 1... Insulating case, 2.3... Piezoelectric resonator, 4...
- Terminal board, 9... Conductive film, P... Filtering circuit component.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 圧電共振子、端子板等の濾波回路構成要素を内部に収納
する絶縁ケースの外表面に、電波シールド用導電膜を被
覆し、これを接地したことを特徴とする電気濾波器。An electric filter characterized in that an electrically conductive film for radio wave shielding is coated on the outer surface of an insulating case that houses filtering circuit components such as a piezoelectric resonator and a terminal plate, and this is grounded.