JPS6226979U - - Google Patents
Info
- Publication number
- JPS6226979U JPS6226979U JP11730885U JP11730885U JPS6226979U JP S6226979 U JPS6226979 U JP S6226979U JP 11730885 U JP11730885 U JP 11730885U JP 11730885 U JP11730885 U JP 11730885U JP S6226979 U JPS6226979 U JP S6226979U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- holding
- output
- mode
- level
- 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 7
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
Landscapes
- Exposure Control For Cameras (AREA)
Description
第１図はこの考案の一実施例の構成を示す回路
図、第２図は同じく他の実施例の構成を示す回路
図、第３図は従来の絞り制御装置の構成を示す回
路図である。
１１……モータ、１２……検波回路、１３……
比較回路、２１，３３……外部操作スイツチ、２
４，３２……保持回路、３１……アナログ／デジ
タル変換回路、３４……デジタル／アナログ変換
回路。
FIG. 1 is a circuit diagram showing the configuration of one embodiment of this invention, FIG. 2 is a circuit diagram showing the configuration of another embodiment, and FIG. 3 is a circuit diagram showing the configuration of a conventional aperture control device. . 11...Motor, 12...Detection circuit, 13...
Comparison circuit, 21, 33...external operation switch, 2
4, 32...holding circuit, 31...analog/digital conversion circuit, 34...digital/analog conversion circuit.
Claims (1)
ル検波する検波手段と、 この検波手段の検波出力を保持可能な保持手段
と、 外部操作スイツチを有し、該スイツチの操作に
応じて、上記検波手段の検波出力を選択するモー
ドと該検波出力を上記保持手段に保持させ、かつ
これを選択するモードとが択一的に切り換わるよ
うに構成された選択手段と、 この選択手段の選択出力が基準レベルとなるよ
うに絞りを制御する制御手段とを具備した絞り制
御装置。[Scope of Claim for Utility Model Registration] A detection means for detecting the level of a video signal clamped to a predetermined level, a holding means capable of holding the detection output of the detection means, and an external operation switch, which includes: a selection means configured to selectively switch between a mode in which the detection output of the detection means is selected and a mode in which the detection output is held in the holding means and selected; An aperture control device comprising: control means for controlling an aperture so that a selected output of the means is at a reference level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11730885U JPS6226979U (en) | 1985-07-31 | 1985-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11730885U JPS6226979U (en) | 1985-07-31 | 1985-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6226979U true JPS6226979U (en) | 1987-02-18 |
Family
ID=31002699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11730885U Pending JPS6226979U (en) | 1985-07-31 | 1985-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0256181A (en) * | 1988-08-22 | 1990-02-26 | Sony Corp | Image pickup device |
-
1985
- 1985-07-31 JP JP11730885U patent/JPS6226979U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0256181A (en) * | 1988-08-22 | 1990-02-26 | Sony Corp | Image pickup device |
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