JPS61166667U - - Google Patents
Info
- Publication number
- JPS61166667U JPS61166667U JP5017385U JP5017385U JPS61166667U JP S61166667 U JPS61166667 U JP S61166667U JP 5017385 U JP5017385 U JP 5017385U JP 5017385 U JP5017385 U JP 5017385U JP S61166667 U JPS61166667 U JP S61166667U
- Authority
- JP
- Japan
- Prior art keywords
- aft
- switching element
- synchronization signal
- voltage
- synchronization
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案のＡＦＴデイフイート装置を実
施したテレビジヨン受像機のブロツク図、第２図
は本考案装置の１実施例の回路図、第３図は同実
施例を説明するための波形図、第４図は従来のテ
レビジヨン受像機のブロツク図である。
１…電子同調チユーナ、２…可変容量ダイオー
ド、３…同調電圧設定用可変抵抗器、４…ＡＦＴ
オンオフ用スイツチ、５…ＡＦＴ回路、８…同期
分離回路、９…同期信号検知回路。
Fig. 1 is a block diagram of a television receiver implementing the AFT defect device of the present invention, Fig. 2 is a circuit diagram of one embodiment of the device of the present invention, and Fig. 3 is a waveform diagram for explaining the embodiment. , FIG. 4 is a block diagram of a conventional television receiver. 1...Electronic tuning tuner, 2...Variable capacitance diode, 3...Variable resistor for tuning voltage setting, 4...AFT
On/off switch, 5...AFT circuit, 8...Sync separation circuit, 9...Sync signal detection circuit.
Claims (1)
設定電圧とＡＦＴ回路よりＡＦＴオンオフ用スイ
ツチング素子を介して得られるＡＦＴ電圧とを重
畳してチユーナーの可変容量ダイオードに印加し
ＡＦＴ動作を行なわしめることができるテレビジ
ヨン受像機において、同期分離回路より得られる
同期信号の有無を検知し該検知出力に基いて前記
スイツチング素子をオンオフ制御する同期信号検
知手段を備え、特に同期信号が存在しないとき前
記スイツチング素子をオフ状態にしてＡＦＴ動作
を解除するようにしたことを特徴とするＡＦＴデ
イフイート装置。 The setting voltage set by the tuning voltage setting variable resistor and the AFT voltage obtained from the AFT circuit via the AFT on/off switching element are superimposed and applied to the variable capacitance diode of the tuner to perform AFT operation. The television receiver is equipped with a synchronization signal detection means for detecting the presence or absence of a synchronization signal obtained from a synchronization separation circuit and controlling the switching element on and off based on the detection output, and in particular, when the synchronization signal is not present, the switching element is switched on and off. An AFT defect device characterized in that an AFT operation is canceled by turning off an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017385U JPS61166667U (en) | 1985-04-03 | 1985-04-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017385U JPS61166667U (en) | 1985-04-03 | 1985-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61166667U true JPS61166667U (en) | 1986-10-16 |
Family
ID=30568061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5017385U Pending JPS61166667U (en) | 1985-04-03 | 1985-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61166667U (en) |
-
1985
- 1985-04-03 JP JP5017385U patent/JPS61166667U/ja active Pending
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