JPS6098920U

JPS6098920U - Up-down converter

Info

Publication number: JPS6098920U
Application number: JP19091683U
Authority: JP
Inventors: 貞夫矢口; 阿波　裕一; 鴨下　秀夫
Original assignee: ミツミ電機株式会社
Priority date: 1983-12-09
Filing date: 1983-12-09
Publication date: 1985-07-05
Anticipated expiration: 1998-12-09
Also published as: JPH062379Y2

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図は本考案になるアップダウンコンバータの一実施
例の分解斜視図、第２図は第１図示のコンバータの一部
の断面図、第３図は第１図示のコンバータの一部の等価
回路、第４図は第３図示の回路の選択特性を示す図、第
５図は本考案コンバータに適用されるアップダウンコン
バータノー例のブロック系統図である。１・・・ケース、２〜４・・・側板、？ａ、７ｂ・・・
端子、９・・・プリント基板、１０〜１７・・・シール
ド板、１８〜２４，２６，２８，２９・・・区画室、２
５ａ、２５ｂ、２７ａ〜２７ｃ・・・ヘリカルコイル、
３０・・・内カバー、３１・・・折曲片、３２〜３６・
・・折曲片群、３７．４２・・・開口窓、３８，４３・
・・貫通Ｌ　４５　ａ、　　４５　ｂ・・・コイルボビ
ン、４６ａｙ４６ｂ・・・コイル、４９ａ、４９ｂ・・
・コイルケース、５０　ａｔ　　５０　ｂ””結合窓、
５１ａ、５１ｂ・・・ネジコア、−〇・・・入力フィル
タ回路、６０・・・第１局部発振器、６２．６７・・・
増幅器、６３・・・第１混合器、６４・・・第１複同調
回路、６６・・・第２複同調回路、６７・・・第２混合
器、６８・・・第２局部発振器、６９・・・出力フィル
タ回路、７０・・・分周器、７１・・・位相比較器、７
２・・・発振器、７４・・・可変分周器、７５・・・低
減フィルタ。Fig. 1 is an exploded perspective view of one embodiment of the up-down converter according to the present invention, Fig. 2 is a sectional view of a part of the converter shown in Fig. 1, and Fig. 3 is an equivalent part of the converter shown in Fig. 1. FIG. 4 is a diagram showing selection characteristics of the circuit shown in FIG. 3, and FIG. 5 is a block diagram of an example of an up-down converter applied to the converter of the present invention. 1...Case, 2-4...Side plate, ? a, 7b...
Terminal, 9... Printed circuit board, 10-17... Shield plate, 18-24, 26, 28, 29... Compartment, 2
5a, 25b, 27a to 27c...helical coil,
30...Inner cover, 31...Folded piece, 32-36.
...Folded piece group, 37.42...Opening window, 38,43.
...Penetration L 45 a, 45 b...Coil bobbin, 46ay46b...Coil, 49a, 49b...
・Coil case, 50 at 50 b"" combined window,
51a, 51b...Screw core, -〇...Input filter circuit, 60...First local oscillator, 62.67...
Amplifier, 63... First mixer, 64... First double tuned circuit, 66... Second double tuned circuit, 67... Second mixer, 68... Second local oscillator, 69 ... Output filter circuit, 70 ... Frequency divider, 71 ... Phase comparator, 7
2... Oscillator, 74... Variable frequency divider, 75... Reduction filter.

Claims

[Scope of utility model registration request]

mixing an incoming cable television signal with a first local oscillator frequency signal into an intermediate frequency signal of a fixed frequency band higher than the frequency band of the cable television signal; In an up-down converter that mixes with a local oscillation frequency signal to produce a television signal in a constant frequency band lower than the frequency band of the intermediate frequency signal, a double-tuned circuit for selecting the tuning of the intermediate frequency signal is wound around a coil. An up-down converter consists of multiple helical coils, each of which is a coil bobbin covered with a metal coil case.