JPS6070969U - Dropout detection device - Google Patents
Dropout detection deviceInfo
- Publication number
- JPS6070969U JPS6070969U JP16127083U JP16127083U JPS6070969U JP S6070969 U JPS6070969 U JP S6070969U JP 16127083 U JP16127083 U JP 16127083U JP 16127083 U JP16127083 U JP 16127083U JP S6070969 U JPS6070969 U JP S6070969U
- Authority
- JP
- Japan
- Prior art keywords
- input terminal
- output
- detection circuit
- operational amplifier
- envelope
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
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図はドロップアウト検出、補償動作を説明するため
のブロック図、第２図は従来のドロップアウト検出装置
を示すブロック図、第３図は従来の欠点を説明するため
の動作波形図、第４図は他の従来例に係るドロップアウ
ト検出装置を示すブロック図、第５図は本考案の一実施
例に係るドロップアウト検出装置を示すブロック図、第
６図は本考案の動作を説明するための動作説明図である
。
２１・・・ＡＭ検波回路、２２・・・オペアンプ、２３
・・・積分回路、Ｄ□・・・ダイオード、０□９ Ｇ２
・・・コン −デンサ、Ｒ１，Ｒ２，Ｒ３・・・抵抗
。FIG. 1 is a block diagram for explaining dropout detection and compensation operations, FIG. 2 is a block diagram for explaining a conventional dropout detection device, FIG. 3 is an operation waveform diagram for explaining the conventional drawbacks, and FIG. FIG. 4 is a block diagram showing a dropout detection device according to another conventional example, FIG. 5 is a block diagram showing a dropout detection device according to an embodiment of the present invention, and FIG. 6 explains the operation of the present invention. FIG. 21... AM detection circuit, 22... operational amplifier, 23
...Integrator circuit, D□...Diode, 0□9 G2
...Capacitor, R1, R2, R3...Resistance.
Claims (1)
と、この入力端子を介して前記映像信号を包路線検波す
る包絡線検波回路と、この包絡線検波回路の出力を一方
の入力端に受け、かつ、この一方の入力端と他方の入力
端との間に抵抗が接続されたオペアンプと、このオペア
ンプの他方の入力端と前記映像信号の入力端子との間に
介装された積分回路とから成り、包絡線検波回路の出力
電圧と前記入力端子の固定電圧との分圧電圧を前記積分
回路で積分した出力を前記オペアンプの他方の入力端に
基準電圧として印加し、この基準電圧と前記包絡線検波
回路の出力とを比較してドロップアウト検出パルスを得
るようにしたこぶを特徴とするドロップアウト検出装置
。an input terminal for inputting a video signal reproduced as an FM signal, an envelope detection circuit for envelope detection of the video signal via this input terminal, and receiving the output of the envelope detection circuit at one input terminal, and an operational amplifier having a resistor connected between one input terminal and the other input terminal, and an integrating circuit interposed between the other input terminal of the operational amplifier and the input terminal of the video signal. The output obtained by integrating the divided voltage of the output voltage of the envelope detection circuit and the fixed voltage of the input terminal by the integration circuit is applied as a reference voltage to the other input terminal of the operational amplifier, and this reference voltage and the envelope A dropout detection device characterized by a hump that obtains a dropout detection pulse by comparing the output of a line detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16127083U JPS6070969U (en) | 1983-10-20 | 1983-10-20 | Dropout detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16127083U JPS6070969U (en) | 1983-10-20 | 1983-10-20 | Dropout detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6070969U true JPS6070969U (en) | 1985-05-20 |
Family
ID=30354471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16127083U Pending JPS6070969U (en) | 1983-10-20 | 1983-10-20 | Dropout detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6070969U (en) |
-
1983
- 1983-10-20 JP JP16127083U patent/JPS6070969U/en active Pending
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