JPS591275U - Composite synchronous signal regeneration circuit - Google Patents
Composite synchronous signal regeneration circuitInfo
- Publication number
- JPS591275U JPS591275U JP9577382U JP9577382U JPS591275U JP S591275 U JPS591275 U JP S591275U JP 9577382 U JP9577382 U JP 9577382U JP 9577382 U JP9577382 U JP 9577382U JP S591275 U JPS591275 U JP S591275U
- Authority
- JP
- Japan
- Prior art keywords
- synchronization signal
- noah
- gate
- pseudo
- composite 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
Landscapes
- Synchronizing For Television (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
笹１図は従来方式による映像とコンピュータからの文字
出力を重畳表示するシステムのブロック図、第２図は本
考案の実施例に係る複合同期信号 ３再生回路を示す回
路図、第３図は第２図の回路の各点における信号波形を
示す動作波形図である。
７・・・同期分離回路、１０・・・フライバックトラン
ス、１３・・・垂直出力回路、２３・・・第１微分回路
、２７・・・第２微分回路、２４． ２５． ２８．
２９゜３２．３６・・・インバータ、２６．３０．３１
゜３３・・・ノアゲート、３５・・・整流回路。Figure 1 is a block diagram of a conventional system for superimposing display of video and character output from a computer, Figure 2 is a circuit diagram showing a composite synchronization signal 3 reproduction circuit according to an embodiment of the present invention, and Figure 3 is a block diagram of a system for superimposing display of video and character output from a computer. FIG. 3 is an operational waveform diagram showing signal waveforms at each point of the circuit in FIG. 2; 7... Synchronous separation circuit, 10... Flyback transformer, 13... Vertical output circuit, 23... First differentiating circuit, 27... Second differentiating circuit, 24. 25. 28.
29°32.36...Inverter, 26.30.31
゜33... Noah gate, 35... Rectifier circuit.
Claims (1)
文字出力を表示するために必要な複合同期信号を再生す
る回路であって、水平ブランキングパルスを微分回路及
びインバータにより疑似水平同期信号とし、又垂直ブラ
ンキングパルスを微分回路及びインバータにより疑似垂
直同期信号とし、夫々を第１ノアゲートに入力して両者
のノアを取る一方、前記両疑似信号をインバータにより
、 再反転し第２ノアゲートに入力してノアを取り
、この第２ノアゲート及び第１ノアゲートの両川力を第
３ノアゲートでノアを取り、更にこの第３ノアゲートの
出力を、映像信号中に含まれる複合同期信号で制御し、
複合同期信号の有無に対応した疑似複合同期信号を得る
ようにしたことを特徴とする複合同期信号再生回路。This is a circuit for reproducing a composite synchronization signal necessary for displaying a character output sent from another system superimposed on a Blouie Tube image, which converts a horizontal blanking pulse into a pseudo-horizontal synchronization signal using a differentiating circuit and an inverter, Further, the vertical blanking pulse is made into a pseudo vertical synchronizing signal by a differentiating circuit and an inverter, and each is inputted to the first NOR gate to take the NOR of both, while the above-mentioned two pseudo signals are re-inverted by the inverter and inputted to the second NOR gate. taking a Noah from the second Noah gate and the first Noah gate, taking a Noah from a third Noah gate, and further controlling the output of the third Noah gate with a composite synchronization signal included in the video signal,
A composite synchronization signal reproducing circuit characterized in that a pseudo composite synchronization signal corresponding to the presence or absence of a composite synchronization signal is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9577382U JPS591275U (en) | 1982-06-28 | 1982-06-28 | Composite synchronous signal regeneration circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9577382U JPS591275U (en) | 1982-06-28 | 1982-06-28 | Composite synchronous signal regeneration circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS591275U true JPS591275U (en) | 1984-01-06 |
Family
ID=30228552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9577382U Pending JPS591275U (en) | 1982-06-28 | 1982-06-28 | Composite synchronous signal regeneration circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591275U (en) |
-
1982
- 1982-06-28 JP JP9577382U patent/JPS591275U/en active Pending
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