JPS6098941U - Up-down converter - Google Patents
Up-down converterInfo
- Publication number
- JPS6098941U JPS6098941U JP10438784U JP10438784U JPS6098941U JP S6098941 U JPS6098941 U JP S6098941U JP 10438784 U JP10438784 U JP 10438784U JP 10438784 U JP10438784 U JP 10438784U JP S6098941 U JPS6098941 U JP S6098941U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- down converter
- frequency band
- local oscillator
- parts
- 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.)
- Granted
Links
Landscapes
- Structure Of Receivers (AREA)
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
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図示のケース内の区画室
の配置を示す図、第3図は第1図示のコンバータの一部
の断面図、第4図は第1図示のコンバータの一部の等価
回路、第5図は第4図示の回路の選択特性を示す図、第
6区は本考案コンバータに適用されるアップダウンコン
バータの一例のブロック系統図、第7図は従来のアップ
ダウンコンバータのケース内の区画室の配置の一例を示
す図である。
1・・・ケース、2〜4・・・側板、7a、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、46a、46b・・・コイル、49 a、 49
b・・・コイルケース、50a、50b・・・結合窓
、51a、51b・・・ネジコア、60・・・入力フィ
ルタ回路、61・・・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、7o・・・分周器、71・・・位相比較器、
72・・・発振器、74・・・可変分周器、75・・・
低域フィルタ。Fig. 1 is an exploded perspective view of one embodiment of the up-down converter according to the present invention, Fig. 2 is a diagram showing the arrangement of compartments in the case shown in Fig. 1, and Fig. 3 is an illustration of the converter shown in Fig. 1. 4 is a partial equivalent circuit of the converter shown in FIG. 1, FIG. 5 is a diagram showing selection characteristics of the circuit shown in FIG. 4, and Section 6 is an up-down diagram applied to the converter of the present invention. FIG. 7, a block system diagram of an example of a converter, is a diagram showing an example of the arrangement of compartments in a case of a conventional up-down converter. 1... Case, 2-4... Side plate, 7a, 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, 46a, 46b...Coil, 49 a, 49
b... Coil case, 50a, 50b... Coupling window, 51a, 51b... Screw core, 60... Input filter circuit, 61... 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, 7o... Frequency divider, 71... Phase comparator,
72... Oscillator, 74... Variable frequency divider, 75...
low pass filter.
Claims (1)
波信号と混合して該ケーブルテレビジョン信号の周波数
帯域より高い一定周波数帯域の中間周波信号とし、該中
間周波信号を第1の同調回路及び第2の同調回路により
同調選択した後第2の局部発振周波信号と混合して該中
間周波信号の周波数帯域より低い一定周波数帯域のテレ
ビジョン信号とするアップダウンコンバータにおいて、
断面方形状のケースの対向する2辺間を2重のシールド
板で2つの部分に隔離し、該2つの部分の一方の部分に
入力回路、該第1の局部発振器及び第1の混合器を配設
し、該2つの部分の他方の部分に該第1の同調回路、第
2の同調回路、第2の局部発振回路、第2の混合器及び
出力回路を夫々配設し、該他方の部分の第1の同調回路
を該第2の同調回路と該第1の局部発振器との間に配設
してなるアップダウンコンバータ。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, the up-down converter performs tuning selection by a second tuning circuit and then mixes it with a second local oscillation frequency signal to produce a television signal in a constant frequency band lower than the frequency band of the intermediate frequency signal.
The two opposing sides of the case having a rectangular cross section are separated into two parts by a double shield plate, and the input circuit, the first local oscillator, and the first mixer are installed in one of the two parts. the first tuning circuit, the second tuning circuit, the second local oscillation circuit, the second mixer and the output circuit are respectively arranged in the other part of the two parts; 1. An up-down converter, wherein a first tuned circuit of the section is disposed between the second tuned circuit and the first local oscillator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10438784U JPS6098941U (en) | 1984-07-10 | 1984-07-10 | Up-down converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10438784U JPS6098941U (en) | 1984-07-10 | 1984-07-10 | Up-down converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6098941U true JPS6098941U (en) | 1985-07-05 |
JPH0112434Y2 JPH0112434Y2 (en) | 1989-04-11 |
Family
ID=30245135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10438784U Granted JPS6098941U (en) | 1984-07-10 | 1984-07-10 | Up-down converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6098941U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012019537A (en) * | 2011-09-05 | 2012-01-26 | Mitsumi Electric Co Ltd | Tuner unit |
-
1984
- 1984-07-10 JP JP10438784U patent/JPS6098941U/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012019537A (en) * | 2011-09-05 | 2012-01-26 | Mitsumi Electric Co Ltd | Tuner unit |
Also Published As
Publication number | Publication date |
---|---|
JPH0112434Y2 (en) | 1989-04-11 |
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