JPH0216680U - - Google Patents
Info
- Publication number
- JPH0216680U JPH0216680U JP9541288U JP9541288U JPH0216680U JP H0216680 U JPH0216680 U JP H0216680U JP 9541288 U JP9541288 U JP 9541288U JP 9541288 U JP9541288 U JP 9541288U JP H0216680 U JPH0216680 U JP H0216680U
- Authority
- JP
- Japan
- Prior art keywords
- pseudo vertical
- vertical synchronizing
- switching means
- synchronizing signal
- synchronization signal
- 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 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Synchronizing For Television (AREA)
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の垂直同期信号発生回路の概略
ブロツク線図、第２図ないし第４図は各回路の信
号波形図である。
１……分周回路、２……カウンタ回路、３……
Ｈシンクゲートパルス発生回路、４……切換回路
、５……位相検出回路。
FIG. 1 is a schematic block diagram of a vertical synchronizing signal generating circuit according to the present invention, and FIGS. 2 to 4 are signal waveform diagrams of each circuit. 1... Frequency divider circuit, 2... Counter circuit, 3...
H sync gate pulse generation circuit, 4... switching circuit, 5... phase detection circuit.
Claims (1)
を基準として互いに一定時間ずらせた２種類の疑
似垂直同期信号を作成する疑似垂直同期信号作成
手段と、 該疑似垂直同期信号作成手段からの２種類の疑
似垂直同期信号を切換えていずれか一方の疑似垂
直同期信号を出力する切換手段と、 水平同期信号を検出するとともに該水平同期信
号と前記切換手段から出力されている疑似垂直同
期信号との位相関係を検出する位相検出手段とを
備え、 該位相検出手段の検出結果により、前記切換手
段から出力されている疑似垂直同期信号が水平同
期信号の近傍にあるとき、該切換手段を切換えて
、出力されていないもう一方の疑似垂直同期信号
を出力するようになされた ことを特徴とする垂
直同期信号発生回路。[Scope of Claim for Utility Model Registration] Pseudo vertical synchronizing signal generating means for producing two types of pseudo vertical synchronizing signals that are shifted by a certain amount of time from each other based on an externally applied head switching pulse; and the pseudo vertical synchronizing signal generating means. switching means for switching between two types of pseudo vertical synchronization signals and outputting one of the pseudo vertical synchronization signals; and detecting a horizontal synchronization signal and combining the horizontal synchronization signal with a pseudo vertical synchronization signal output from the switching means. and a phase detection means for detecting a phase relationship between the switching means and the switching means, when the pseudo vertical synchronization signal outputted from the switching means is in the vicinity of the horizontal synchronization signal according to the detection result of the phase detection means. 1. A vertical synchronizing signal generating circuit, characterized in that the vertical synchronizing signal generating circuit is configured to output the other pseudo vertical synchronizing signal that is not output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9541288U JPH0216680U (en) | 1988-07-19 | 1988-07-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9541288U JPH0216680U (en) | 1988-07-19 | 1988-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0216680U true JPH0216680U (en) | 1990-02-02 |
Family
ID=31320082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9541288U Pending JPH0216680U (en) | 1988-07-19 | 1988-07-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0216680U (en) |
-
1988
- 1988-07-19 JP JP9541288U patent/JPH0216680U/ja active Pending