JPS6017046U

JPS6017046U - input tuning circuit

Info

Publication number: JPS6017046U
Application number: JP10780383U
Authority: JP
Inventors: 坂本　収司
Original assignee: 三洋電機株式会社
Priority date: 1983-07-11
Filing date: 1983-07-11
Publication date: 1985-02-05
Also published as: JPH0127300Y2

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

[Brief explanation of drawings]

第１図は従来の入力同調回路を示す回路図であり、第２
図は他の従来例の回路図、第３図及び第４図は第２図の
等価回路図、第５図は本考案を実施した入力同調回路を
示す回路図であり、第６図及び第７図は第５図の等価回
路図、第８図は第５図の説明図である。１・・・・・・入力端子、Ｄ２・・・・・・可変容量ダ
イオード、Ｌ３・・・・・・ハイバンド同調フィル、”
１１　Ｌ２・・・・・・ローバンド同調コイル、Ｌ４・
・・・・・第２のハイバンド同調コイル、Ｃ□・・・・
・・直流阻止コンデンサ、Ｄ□・曲・スイッチングダイ
オード、Ｃ６・・・・・・コンデンサ、”６’　＋　”
？’・・・・・・第１、第２マツチングコイル。FIG. 1 is a circuit diagram showing a conventional input tuning circuit.
3 and 4 are equivalent circuit diagrams of FIG. 2, FIG. 5 is a circuit diagram showing an input tuning circuit implementing the present invention, and FIGS. 6 and 4 are circuit diagrams of another conventional example. 7 is an equivalent circuit diagram of FIG. 5, and FIG. 8 is an explanatory diagram of FIG. 1... Input terminal, D2... Variable capacitance diode, L3... High band tuning fill.
11 L2...Low band tuning coil, L4.
...Second high band tuning coil, C□...
...DC blocking capacitor, D□・switching diode, C6...capacitor, "6'+"
? '...1st and 2nd matching coil.

Claims

[Scope of utility model registration request]

A series circuit consisting of a high band tuning coil and a low band tuning coil is connected in parallel to the tuning variable capacitance diode,
One end of a switching diode is connected to the connection midpoint between the high band tuning coil and the low band tuning coil, and a second high band tuning coil and a DC blocking capacitor are connected between the other end of the switching diode and a reference potential point, In an input tuning circuit whose end is connected to an input terminal coupled to the low band coil via a high band matching coil and a capacitor, the input matching coil is formed by first and second manual matching coils. An input tuning circuit characterized in that the middle point of connection of the first and second manual matching coils is connected to the low band tuning coil.