JPS61199977U - - Google Patents
Info
- Publication number
- JPS61199977U JPS61199977U JP8380585U JP8380585U JPS61199977U JP S61199977 U JPS61199977 U JP S61199977U JP 8380585 U JP8380585 U JP 8380585U JP 8380585 U JP8380585 U JP 8380585U JP S61199977 U JPS61199977 U JP S61199977U
- Authority
- JP
- Japan
- Prior art keywords
- gain
- gain amplifier
- control
- switch
- control section
- 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
- 238000003384 imaging method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案装置の一例を示すブロツク系統
図、東２図Ａ〜Ｃは夫々本考案装置によるビユー
フアインダ内での表示の各態様を示す図、第３図
は本考案装置の要部の一実施例を示す回路図であ
る。
１……映像信号入力端子、２……利得増幅器、
３……ＡＧＣ制御部、４……ＡＧＣ回路（自動利
得制御回路）、５……スイツチ、６……映像信号
出力端子、７……表示用文字発生回路、８……ビ
ユーフアインダ、Ｑ１……ＰＮＰトランジスタ、
Ｑ２……ＮＰＮトランジスタ。
Fig. 1 is a block system diagram showing an example of the device of the present invention, Figs. 2A to 2C are diagrams each showing various aspects of display in the viewfinder by the device of the present invention, and Fig. 3 shows the main parts of the device of the present invention. FIG. 2 is a circuit diagram showing an example. 1...Video signal input terminal, 2...Gain amplifier,
3...AGC control section, 4...AGC circuit (automatic gain control circuit), 5...Switch, 6...Video signal output terminal, 7...Display character generation circuit, 8...Viewer indexer, Q1 ... PNP transistor,
Q2 ...NPN transistor.
Claims (1)
られた映像信号を増幅する利得増幅器と、該利得
増幅器の利得を一定値に固定するか可変制御する
かの切換えを行なうスイツチと、該利得増幅器と
共にＡＧＣ回路を構成し該スイツチの切換操作に
連動して該利得増幅器の利得を制御する制御信号
を発生する制御部と、該スイツチ及び制御部の各
出力信号が夫々供給され該利得増幅器の利得制御
が固定か可変かを示す第１の表示と該利得増幅器
の利得が可変制御される場合はその利得が上昇し
たか否かを示す第２の表示とを夫々テレビジヨン
カメラのビユーフアインダ内に表示する表示手段
とより構成したＡＧＣ回路の動作状態表示装置。 A gain amplifier that amplifies the video signal obtained by imaging a subject with a television camera, a switch that switches the gain of the gain amplifier to be fixed at a constant value or variable control, and an AGC circuit together with the gain amplifier. a control section that generates a control signal for controlling the gain of the gain amplifier in conjunction with the switching operation of the switch; and a control section that is supplied with each output signal of the switch and the control section so that the gain control of the gain amplifier is fixed. Display means for displaying a first display indicating whether the gain of the gain amplifier is variable, and a second display indicating whether the gain has increased when the gain of the gain amplifier is variable controlled, respectively, in the viewfinder of the television camera. An operating status display device for an AGC circuit constructed of the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8380585U JPH0411413Y2 (en) | 1985-06-03 | 1985-06-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8380585U JPH0411413Y2 (en) | 1985-06-03 | 1985-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61199977U true JPS61199977U (en) | 1986-12-15 |
| JPH0411413Y2 JPH0411413Y2 (en) | 1992-03-23 |
Family
ID=30632764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8380585U Expired JPH0411413Y2 (en) | 1985-06-03 | 1985-06-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411413Y2 (en) |
-
1985
- 1985-06-03 JP JP8380585U patent/JPH0411413Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411413Y2 (en) | 1992-03-23 |
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