JPS62109570U - - Google Patents
Info
- Publication number
- JPS62109570U JPS62109570U JP20143585U JP20143585U JPS62109570U JP S62109570 U JPS62109570 U JP S62109570U JP 20143585 U JP20143585 U JP 20143585U JP 20143585 U JP20143585 U JP 20143585U JP S62109570 U JPS62109570 U JP S62109570U
- Authority
- JP
- Japan
- Prior art keywords
- drive circuit
- level
- crt drive
- amplitude
- input
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は、本考案の一実施例を示す回路ブロツ
ク図、第２図及び第３図は、第１図の装置におけ
る振幅制御回路２の入出力特性を示すグラフ、第
４図及び第５図は、第１図の装置の各部の作用を
示す波形図、第６図は、本考案の他の実施例を示
す回路ブロツク図、第７図は、第６図の装置にお
ける振幅制限回路２の入出力特性を示すグラフ、
第８図は、第６図の装置の各部の作用を示す波形
図である。
主要部分の符号の説明、１…輪郭補正回路、２
…振幅抑制回路。
FIG. 1 is a circuit block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are graphs showing input/output characteristics of the amplitude control circuit 2 in the device shown in FIG. 1, and FIGS. 1. FIG. 6 is a circuit block diagram showing another embodiment of the present invention. FIG. 7 is an amplitude limiting circuit 2 in the device of FIG. 6. A graph showing the input/output characteristics of
FIG. 8 is a waveform chart showing the operation of each part of the device of FIG. 6. Explanation of symbols of main parts, 1... Contour correction circuit, 2
...amplitude suppression circuit.
Claims (1)
に互いに逆極性の２つのパルスの各々を付加する
ことによつて輪郭を補正する輪郭補正手段を含む
ＣＲＴ駆動回路であつて、入力の瞬時レベルが所
定レベル以上になつたとき前記入力の周波数に応
じたレベルだけ前記入力の瞬時レベルが低下する
ように振幅を抑制する振幅抑制手段を備え、前記
輪郭補正手段を経た映像信号を前記振幅抑制手段
に供給するようにしたことを特徴とするＣＲＴ駆
動回路。 A CRT drive circuit comprising contour correction means for correcting contour by adding two pulses of opposite polarity immediately before and after a point of change in the instantaneous level of a video signal, the CRT drive circuit comprising: an amplitude suppressing means for suppressing the amplitude so that the instantaneous level of the input is reduced by a level corresponding to the frequency of the input when the level exceeds a predetermined level, and the video signal that has passed through the contour correction means is sent to the amplitude suppressing means. A CRT drive circuit characterized in that the CRT drive circuit is configured to supply
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20143585U JPS62109570U (en) | 1985-12-25 | 1985-12-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20143585U JPS62109570U (en) | 1985-12-25 | 1985-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62109570U true JPS62109570U (en) | 1987-07-13 |
Family
ID=31164883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20143585U Pending JPS62109570U (en) | 1985-12-25 | 1985-12-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62109570U (en) |
-
1985
- 1985-12-25 JP JP20143585U patent/JPS62109570U/ja active Pending
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