JPS6285071U - - Google Patents
Info
- Publication number
- JPS6285071U JPS6285071U JP17537685U JP17537685U JPS6285071U JP S6285071 U JPS6285071 U JP S6285071U JP 17537685 U JP17537685 U JP 17537685U JP 17537685 U JP17537685 U JP 17537685U JP S6285071 U JPS6285071 U JP S6285071U
- Authority
- JP
- Japan
- Prior art keywords
- catv converter
- converter
- frequency
- local oscillation
- conversion means
- 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
- 230000010355 oscillation Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は、本考案のＣＡＴＶコンバータの一実
施例のブロツク図であり、第２図は、第１図の動
作を説明するタイムチヤートであり、第３図は、
従来のＣＡＴＶコンバータのブロツク図であり、
第４図は、第３図の動作を説明するタイムチヤー
トである。
３：第１ミキサ回路、５：第２ミキサ回路、７
：第１局部発振回路、８：第２局部発振回路、１
１：選局コントロール回路、１３：ＣＡＴＶコン
バータ出力端子、１４：スイツチ回路。
FIG. 1 is a block diagram of an embodiment of the CATV converter of the present invention, FIG. 2 is a time chart explaining the operation of FIG. 1, and FIG.
It is a block diagram of a conventional CATV converter,
FIG. 4 is a time chart explaining the operation of FIG. 3. 3: first mixer circuit, 5: second mixer circuit, 7
: first local oscillation circuit, 8: second local oscillation circuit, 1
1: Tuning control circuit, 13: CATV converter output terminal, 14: switch circuit.
Claims (1)
記第１の周波数変換手段に含まれる第１局部発振
回路の発振周波数を選局コントロール回路からの
チユーニング電圧で切り換えて選局するダブルコ
ンバージヨン方式のＣＡＴＶコンバータにおいて
、前記第１局部発振回路の発振周波数が切り換わ
るのに必要な期間中、前記選局コントロール回路
からの信号でＣＡＴＶコンバータ出力端子に出力
が生じないように構成したことを特徴とするＣＡ
ＴＶコンバータ。 (2) 前記第１局部発振回路の発振周波数が切り
換わるのに必要な期間中、前記選局コントロール
回路からの信号で前記第２の周波数変換手段に含
まれる第２局部発振回路の発振動作を停止させて
前記ＣＡＴＶコンバータ出力端子に出力が生じな
いように構成した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ＣＡＴＶコンバータ。[Claims for Utility Model Registration] (1) It has first and second frequency conversion means, and the oscillation frequency of a first local oscillation circuit included in the first frequency conversion means is tuned by a tuning control circuit. In a double-conversion type CATV converter that selects stations by switching based on voltage, during the period required for the oscillation frequency of the first local oscillation circuit to switch, a signal from the station selection control circuit is output to the CATV converter output terminal. A CA characterized in that it is configured so that it does not occur.
TV converter. (2) During the period required for the oscillation frequency of the first local oscillation circuit to switch, the oscillation operation of the second local oscillation circuit included in the second frequency conversion means is controlled by the signal from the tuning control circuit. The CATV converter according to claim 1, wherein the CATV converter is configured such that no output is generated at the output terminal of the CATV converter when the CATV converter is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17537685U JPS6285071U (en) | 1985-11-14 | 1985-11-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17537685U JPS6285071U (en) | 1985-11-14 | 1985-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6285071U true JPS6285071U (en) | 1987-05-30 |
Family
ID=31114644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17537685U Pending JPS6285071U (en) | 1985-11-14 | 1985-11-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6285071U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911568B2 (en) * | 1975-04-30 | 1984-03-16 | 三菱化学株式会社 | Manufacturing method of ethylene glycol |
| JPS5950127B2 (en) * | 1977-07-19 | 1984-12-06 | 三菱電機株式会社 | twin amplifier |
-
1985
- 1985-11-14 JP JP17537685U patent/JPS6285071U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911568B2 (en) * | 1975-04-30 | 1984-03-16 | 三菱化学株式会社 | Manufacturing method of ethylene glycol |
| JPS5950127B2 (en) * | 1977-07-19 | 1984-12-06 | 三菱電機株式会社 | twin amplifier |
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