JPS60120558U - Dropout detection circuit - Google Patents
Dropout detection circuitInfo
- Publication number
- JPS60120558U JPS60120558U JP659784U JP659784U JPS60120558U JP S60120558 U JPS60120558 U JP S60120558U JP 659784 U JP659784 U JP 659784U JP 659784 U JP659784 U JP 659784U JP S60120558 U JPS60120558 U JP S60120558U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- detection circuit
- generating means
- comparison
- 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
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図は従来のドロップアウト検出回路の例を示すブロ
ック図、第２図は第１図の回路の動作を示す各部信号波
形図、第３図は本考案の実施例の回路ブロック図、第４
図は第３図の装置の動作を示す各部信号波形図である。
主要部分の符号の説明、９，１３・・・・・・レベルコ
ンパレータ、１０・・・・・・充放電回路、１１・・・
・・・ＰＦ０FIG. 1 is a block diagram showing an example of a conventional dropout detection circuit, FIG. 2 is a signal waveform diagram of each part showing the operation of the circuit in FIG. 1, and FIG. 3 is a circuit block diagram of an embodiment of the present invention. 4
The figure is a signal waveform diagram of each part showing the operation of the apparatus of FIG. 3. Explanation of symbols of main parts, 9, 13... Level comparator, 10... Charge/discharge circuit, 11...
...PF0
Claims (2)
生する信号発生手段と、この信号発生手段の出力を積分
する積分手段と、この積分出力と前記信号発生手段の出
力とをレベル比較する比較手段とを有し、この比較出力
によってドロップアウト検出をなすようにしたことを特
徴とするドロップアウト検出回路。(1) Signal generating means that generates a signal having a level corresponding to the period of the input signal, integrating means that integrates the output of this signal generating means, and level comparison between this integrated output and the output of the signal generating means. What is claimed is: 1. A dropout detection circuit, comprising a comparison means, and detects a dropout based on the comparison output.
号の平均レベルに応じた信号をレベル比較するコンパレ
ータと、このコンパレータ出力の周期に応じたレベルを
有する傾斜状信号を発生する手段とからなることを特徴
とする実用新案登録請求の範囲第１項記載の回路。(2) The signal generating means includes a comparator that compares the levels of the input signal and a signal corresponding to the average level of the input signal, and means for generating a ramp signal having a level corresponding to the cycle of the output of the comparator. The circuit according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984006597U JPH0643898Y2 (en) | 1984-01-20 | 1984-01-20 | Dropout detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984006597U JPH0643898Y2 (en) | 1984-01-20 | 1984-01-20 | Dropout detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60120558U true JPS60120558U (en) | 1985-08-14 |
| JPH0643898Y2 JPH0643898Y2 (en) | 1994-11-14 |
Family
ID=30484186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984006597U Expired - Lifetime JPH0643898Y2 (en) | 1984-01-20 | 1984-01-20 | Dropout detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643898Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557162U (en) * | 1978-06-27 | 1980-01-17 |
-
1984
- 1984-01-20 JP JP1984006597U patent/JPH0643898Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557162U (en) * | 1978-06-27 | 1980-01-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0643898Y2 (en) | 1994-11-14 |
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