JPS5988979U - Television receiver AFT malfunction prevention circuit - Google Patents
Television receiver AFT malfunction prevention circuitInfo
- Publication number
- JPS5988979U JPS5988979U JP18510182U JP18510182U JPS5988979U JP S5988979 U JPS5988979 U JP S5988979U JP 18510182 U JP18510182 U JP 18510182U JP 18510182 U JP18510182 U JP 18510182U JP S5988979 U JPS5988979 U JP S5988979U
- Authority
- JP
- Japan
- Prior art keywords
- aft
- television receiver
- malfunction prevention
- prevention circuit
- tuner
- 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
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図は音声キャリアを利用したＡＦＴ動作を説明する
ための特性図、第２図は本考案を採用したテレビジョン
受像機の一実施例を示す図である。
１１：単安定マルチバイブレーク、Ｄ２ニスイツチング
ダイオード、Ａ：局部発振周波数制御端子、ＳＷ：ＡＦ
Ｔ動作オン、オフ用スイッチ。FIG. 1 is a characteristic diagram for explaining the AFT operation using an audio carrier, and FIG. 2 is a diagram showing an embodiment of a television receiver employing the present invention. 11: Monostable multi-by-break, D2 switching diode, A: Local oscillation frequency control terminal, SW: AF
T operation on/off switch.
Claims (1)
に応じた制御電圧によつそチューナをＡＦＴ動作させ、
且つ、このＡＦＴ動作のオン、オフ用のスイッチを備え
るテレビジョン受像機に於いて、前記スイッチによるＡ
ＦＴ動作のオフからオンへの切換時に一定の電圧を発生
する回路と１、この電圧を前記制御電圧と切換えてチュ
ーナの局部発振周波数制御端子に印加するスイッチング
素子とを備え、前記切換時にチューナの同調点を一定の
周波数まで一旦低下させるようにしたことを特徴とする
テレビジョン受像機のＡＦＴ誤動作防止回路。AFT operation of the tuner is performed depending on a control voltage according to the frequency of the audio carrier separated and extracted from the tuner output,
In addition, in a television receiver equipped with a switch for turning on and off the AFT operation, the AFT operation is controlled by the switch.
The circuit includes a circuit that generates a constant voltage when the FT operation is switched from off to on, and a switching element that switches this voltage with the control voltage and applies it to the local oscillation frequency control terminal of the tuner. An AFT malfunction prevention circuit for a television receiver, characterized in that the tuning point is temporarily lowered to a certain frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18510182U JPS5988979U (en) | 1982-12-06 | 1982-12-06 | Television receiver AFT malfunction prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18510182U JPS5988979U (en) | 1982-12-06 | 1982-12-06 | Television receiver AFT malfunction prevention circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5988979U true JPS5988979U (en) | 1984-06-16 |
Family
ID=30400167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18510182U Pending JPS5988979U (en) | 1982-12-06 | 1982-12-06 | Television receiver AFT malfunction prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5988979U (en) |
-
1982
- 1982-12-06 JP JP18510182U patent/JPS5988979U/en active Pending
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