JPH0181033U - - Google Patents
Info
- Publication number
- JPH0181033U JPH0181033U JP1987175913U JP17591387U JPH0181033U JP H0181033 U JPH0181033 U JP H0181033U JP 1987175913 U JP1987175913 U JP 1987175913U JP 17591387 U JP17591387 U JP 17591387U JP H0181033 U JPH0181033 U JP H0181033U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- video detection
- video
- signal
- television receiver
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１乃至第３図は本考案の一実施例を示すもの
であつて、第１図は自動探局装置の要部回路図、
第２図はＡＦＴ回路を本来の自動周波数同調回路
として使用した場合の動作特性図、第３図はＡＦ
Ｔ回路の動作特性図である。
１は映像中間周波数ＩＣ、５は同期検波回路（
映像検出回路）、６は検出取消回路である。
1 to 3 show an embodiment of the present invention, and FIG. 1 is a circuit diagram of the main part of an automatic station searching device;
Figure 2 shows the operating characteristics when the AFT circuit is used as the original automatic frequency tuning circuit, and Figure 3 shows the AF
FIG. 3 is an operational characteristic diagram of the T circuit. 1 is a video intermediate frequency IC, 5 is a synchronous detection circuit (
6 is a detection cancellation circuit.
Claims (1)
定可能である電子選局回路と、映像信号を検出す
ると映像検出信号を発する映像検出回路と、電子
選局回路により全てのチヤンネルを走査し、映像
検出回路から映像検出信号が発せられたチヤンネ
ルのみを順次電子選局回路に設定する探局手段と
からなるテレビジヨン受信機の自動探局装置にお
いて、 映像中間周波増幅回路からの映像信号の周波数
と基準周波数との差が所定範囲内である場合に誤
検出判定信号を発する誤検出判定回路と、この誤
検出判定回路が誤検出判定信号を発した場合に、
映像検出回路から発せられる映像検出信号を取り
消す検出取消回路とが設けられたことを特徴とす
るテレビジヨン受信機の自動探局装置。[Claim for Utility Model Registration] An electronic tuning circuit that can set any channel using a synthesizer method, a video detection circuit that emits a video detection signal when a video signal is detected, and an electronic tuning circuit that scans all channels. In an automatic station searching device for a television receiver, the automatic station searching device for a television receiver comprises a searching means that sequentially sets only the channels on which the video detection signal is emitted from the video detection circuit to the electronic tuning circuit. an erroneous detection determination circuit that emits an erroneous detection determination signal when the difference between the frequency of 1 and a reference frequency is within a predetermined range;
An automatic station search device for a television receiver, characterized in that it is provided with a detection cancellation circuit for canceling a video detection signal emitted from the video detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175913U JPH0537547Y2 (en) | 1987-11-18 | 1987-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175913U JPH0537547Y2 (en) | 1987-11-18 | 1987-11-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0181033U true JPH0181033U (en) | 1989-05-31 |
| JPH0537547Y2 JPH0537547Y2 (en) | 1993-09-22 |
Family
ID=31467688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987175913U Expired - Lifetime JPH0537547Y2 (en) | 1987-11-18 | 1987-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0537547Y2 (en) |
-
1987
- 1987-11-18 JP JP1987175913U patent/JPH0537547Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0537547Y2 (en) | 1993-09-22 |
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