JPS6452326U - - Google Patents
Info
- Publication number
- JPS6452326U JPS6452326U JP14850087U JP14850087U JPS6452326U JP S6452326 U JPS6452326 U JP S6452326U JP 14850087 U JP14850087 U JP 14850087U JP 14850087 U JP14850087 U JP 14850087U JP S6452326 U JPS6452326 U JP S6452326U
- Authority
- JP
- Japan
- Prior art keywords
- ground plane
- phase
- power supply
- local oscillator
- locked loop
- 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 5
Landscapes
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
Description
第１図は本考案の一実施例を示すチヤンネル選
局装置のブロツク図、第２図は従来のチヤンネル
選局装置のブロツク図、第３図はＣＡＴＶ入力テ
レビ信号の受信帯域図、第４図は２点の接地面の
電位変化を示す接地電位波形図、第５図は選局用
局部発振器の制御電圧特性図である。
３……ＶＣＯ（電圧制御局部発振器）、７……
分周器、８……位相検波器、９……基準発振器、
１０……低域フイルタ、１１……電源回路（電源
供給手段）、１２……接続端子、１３……チヨー
クコイル。
Fig. 1 is a block diagram of a channel selection device showing an embodiment of the present invention, Fig. 2 is a block diagram of a conventional channel selection device, Fig. 3 is a reception band diagram of a CATV input television signal, and Fig. 4 5 is a ground potential waveform diagram showing potential changes on the ground plane at two points, and FIG. 5 is a control voltage characteristic diagram of a local oscillator for channel selection. 3...VCO (voltage controlled local oscillator), 7...
Frequency divider, 8... Phase detector, 9... Reference oscillator,
10...Low-pass filter, 11...Power circuit (power supply means), 12...Connection terminal, 13...Chiyoke coil.
Claims (1)
タと電圧制御局部発振器で構成されたフエーズロ
ツクドループ手段と、このフエーズロツクドルー
プ手段と分離された電源供給手段を有する選局装
置であつて、前記電圧制御局部発振器の接地面と
前記抵域フイルタ接地面を直接接続して同電位接
地面となるように構成し、かつこの同電位接地面
を電源供給手段の接地点にチヨークコイルを介し
て接続したチヤンネル選局装置。 A tuning device comprising a phase-locked loop means composed of a frequency divider, a phase detector, a reference oscillator, a low-pass filter, and a voltage-controlled local oscillator, and a power supply means separated from the phase-locked loop means. The ground plane of the voltage controlled local oscillator and the ground plane of the resistance filter are directly connected to form a ground plane with the same potential, and the ground plane with the same potential is connected to the ground point of the power supply means via a chiyoke coil. channel selection device connected to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14850087U JPH0611670Y2 (en) | 1987-09-28 | 1987-09-28 | Channel tuning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14850087U JPH0611670Y2 (en) | 1987-09-28 | 1987-09-28 | Channel tuning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452326U true JPS6452326U (en) | 1989-03-31 |
| JPH0611670Y2 JPH0611670Y2 (en) | 1994-03-23 |
Family
ID=31419880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14850087U Expired - Lifetime JPH0611670Y2 (en) | 1987-09-28 | 1987-09-28 | Channel tuning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0611670Y2 (en) |
-
1987
- 1987-09-28 JP JP14850087U patent/JPH0611670Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0611670Y2 (en) | 1994-03-23 |
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