JPS61104630U - - Google Patents
Info
- Publication number
- JPS61104630U JPS61104630U JP18911684U JP18911684U JPS61104630U JP S61104630 U JPS61104630 U JP S61104630U JP 18911684 U JP18911684 U JP 18911684U JP 18911684 U JP18911684 U JP 18911684U JP S61104630 U JPS61104630 U JP S61104630U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- capacitor
- circuit
- adjusted
- tuned circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は、本考案の高周波フイルタ回路の構造
の一実施例たるＩＦフイルタの構造の筐体の一部
を切り欠いた斜視図、第２図は、第１図の高周波
フイルタ回路の構造の等価回路図、第３図は、ダ
ブルスーパーヘテロダイン方式の一般的構成を示
す図、第４図は、ＩＦフイルタとして要求される
特性を示す図、第５図は、従来のＩＦフイルタの
構造の一例の筐体の一部を切り欠いた斜視図、第
６図は、第５図のＩＦフイルタの構造の等価回路
図である。
１２：貫通コンデンサ、１４：入力側コイル、
１６：コンデンサ、２１：プリント回路基板、２
１ｃ：第２の接続パターン、２２：第１のコイル
、２３：第２のコイル。
FIG. 1 is a partially cutaway perspective view of the structure of an IF filter, which is an embodiment of the structure of the high-frequency filter circuit of the present invention, and FIG. 2 is a perspective view of the structure of the high-frequency filter circuit of FIG. Equivalent circuit diagram, Fig. 3 shows the general configuration of the double superheterodyne system, Fig. 4 shows the characteristics required for an IF filter, and Fig. 5 shows an example of the structure of a conventional IF filter. FIG. 6 is a perspective view with a part of the casing cut away, and FIG. 6 is an equivalent circuit diagram of the structure of the IF filter shown in FIG. 12: Feedthrough capacitor, 14: Input side coil,
16: Capacitor, 21: Printed circuit board, 2
1c: second connection pattern, 22: first coil, 23: second coil.
Claims (1)
入力側コイルに、一端が接地された第１のコイル
を誘導結合するように配置し、この第１のコイル
の他端に、前記入力側コイルおよび前記第１のコ
イルと誘導結合しないように配置された第２のコ
イルの一端を接続し、この第２のコイルの他端を
コンデンサを介して接地して、前記第１と第２の
コイルおよび前記コンデンサにより複同調回路の
２次側の同調回路を形成し、前記第１と第２のコ
イルの接続点より出力を得るようにして、前記第
２のコイルおよび前記コンデンサによりトラツプ
回路を形成し、前記第１のコイルを調整して、通
過させる周波数帯域および誘導結合の結合度等を
調整するとともに、前記第２のコイルを調整して
、通過周波数帯域外の確実に阻止させる特定の周
波数等を調整するように構成されていることを特
徴とする高周波フイルタ回路の構造。 (2) 前記第２のコイルと前記コンデンサとを接
続するプリント回路基板の接続パターンに、前記
第２のコイルを近付け若しくは遠ざけて、前記第
２のコイルを調整することを特徴とする実用新案
登録請求の範囲第１項記載の高周波フイルタ回路
の構造。[Claims for Utility Model Registration] (1) A first coil whose one end is grounded is arranged so as to be inductively coupled to an input side coil forming a primary side tuned circuit of a double tuned circuit, and this first One end of a second coil arranged so as not to be inductively coupled to the input side coil and the first coil is connected to the other end of the coil, and the other end of this second coil is grounded via a capacitor. The first and second coils and the capacitor form a secondary-side tuned circuit of a double-tuned circuit, and an output is obtained from a connection point between the first and second coils. A trap circuit is formed by the second coil and the capacitor, and the first coil is adjusted to adjust the frequency band to be passed and the degree of inductive coupling, etc., and the second coil is adjusted to A structure of a high frequency filter circuit characterized in that it is configured to adjust a specific frequency, etc. that is reliably blocked outside a frequency band. (2) Registration of a utility model characterized in that the second coil is adjusted by moving the second coil closer to or away from a connection pattern of a printed circuit board that connects the second coil and the capacitor. A structure of a high frequency filter circuit according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18911684U JPS61104630U (en) | 1984-12-13 | 1984-12-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18911684U JPS61104630U (en) | 1984-12-13 | 1984-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61104630U true JPS61104630U (en) | 1986-07-03 |
Family
ID=30746576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18911684U Pending JPS61104630U (en) | 1984-12-13 | 1984-12-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61104630U (en) |
-
1984
- 1984-12-13 JP JP18911684U patent/JPS61104630U/ja active Pending
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