JPS61206370U - - Google Patents
Info
- Publication number
- JPS61206370U JPS61206370U JP1985089516U JP8951685U JPS61206370U JP S61206370 U JPS61206370 U JP S61206370U JP 1985089516 U JP1985089516 U JP 1985089516U JP 8951685 U JP8951685 U JP 8951685U JP S61206370 U JPS61206370 U JP S61206370U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- receives
- hyperband
- catv
- output end
- 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
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Synchronizing For Television (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案の一実施例であるＣＡＴＶチユ
ーナ回路の概略構成図、第２図は二つの独立した
チユーナ回路を持つ従来のＣＡＴＶチユーナの構
成を示すブロツク図、第３図は混合回路を共用化
した複数バンド受信型のＣＡＴＶチユーナの概略
構成図である。
１０…ＣＡＴＶチユーナ、１１…ハイパーバン
ド受信用ＲＦ回路、１４…ロウバンド及びハイバ
ンド受信用ＲＦ回路、１８…混合回路、２０…差
動増幅器、２１，２２…二つの入力端子、２３，
２４…接地用スイツチ回路。
Figure 1 is a schematic configuration diagram of a CATV tuner circuit that is an embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a conventional CATV tuner having two independent tuner circuits, and Figure 3 is a block diagram showing the configuration of a conventional CATV tuner circuit that has two independent tuner circuits. 1 is a schematic configuration diagram of a shared CATV tuner that receives multiple bands; FIG. 10...CATV tuner, 11...RF circuit for hyperband reception, 14...RF circuit for low band and high band reception, 18...mixing circuit, 20...differential amplifier, 21, 22...two input terminals, 23,
24...Grounding switch circuit.
Claims (1)
パーバンドの３バンドで受信するＣＡＴＶチユー
ナにおいて、ハイバンド及びロウバンドを受信す
る第１のＲＦ回路の出力端とハイパーバンドを受
信する第２のＲＦ回路の出力端とを、単一混合回
路の入力側に設けられた差動増幅器の異なる入力
端子に接続するとともに、各入力端子に接地用ス
イツチ回路を設け、一方のＲＦ回路の受信動作時
には、他方のＲＦ回路の出力を受ける入力端子を
接地させるようにしたことを特徴とするＣＡＴＶ
チユーナ回路。 In a CATV tuner that receives VHF bands in three bands: high band, low band, and hyperband, an output end of a first RF circuit that receives the high band and low band, and an output end of a second RF circuit that receives the hyperband. are connected to different input terminals of a differential amplifier provided on the input side of a single mixing circuit, and a grounding switch circuit is provided at each input terminal, so that when one RF circuit is in reception operation, the other RF circuit is CATV characterized in that the input terminal receiving the output is grounded.
Chuna circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985089516U JPH0354461Y2 (en) | 1985-06-13 | 1985-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985089516U JPH0354461Y2 (en) | 1985-06-13 | 1985-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61206370U true JPS61206370U (en) | 1986-12-26 |
| JPH0354461Y2 JPH0354461Y2 (en) | 1991-12-02 |
Family
ID=30643668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985089516U Expired JPH0354461Y2 (en) | 1985-06-13 | 1985-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0354461Y2 (en) |
-
1985
- 1985-06-13 JP JP1985089516U patent/JPH0354461Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0354461Y2 (en) | 1991-12-02 |
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