JPS55111359A - Detector - Google Patents
DetectorInfo
- Publication number
- JPS55111359A JPS55111359A JP1532179A JP1532179A JPS55111359A JP S55111359 A JPS55111359 A JP S55111359A JP 1532179 A JP1532179 A JP 1532179A JP 1532179 A JP1532179 A JP 1532179A JP S55111359 A JPS55111359 A JP S55111359A
- Authority
- JP
- Japan
- Prior art keywords
- output
- flip
- flop circuits
- pulse
- nand gate
- 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
- 230000010355 oscillation Effects 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
PURPOSE: To prevent an optical detector from being affected by disturbance, by setting flip-flop circuits when both of a pulse light emission signal and a light reception signal are present and by resetting the flip-flop circuits when only the pulse light emission signal is present.
CONSTITUTION: A pulse oscillation circuit comprises NAND gates N1WN3. An LED is caused to emit light, through a transistor Tr. The light is reflected by a detected object P and then introduced into a photodiode PD, the electric output of which is amplified by an operational amplifier. The amplified output is applied to a NAND gate N4 through said one N3. A pulse oscillation output is also applied to the NAND gate N4. When the pulse oscillation output 1 coincides with the output of the NAND gate N3, flip-flop circuits N6, N7 are set to produce an output 6. When a light reception signal 4 is not resent, the flip-flop circuits are reset not to produce the output 6. This results in suppressing the influence of disturbance and providing a quick responding property.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1532179A JPS55111359A (en) | 1979-02-13 | 1979-02-13 | Detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1532179A JPS55111359A (en) | 1979-02-13 | 1979-02-13 | Detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55111359A true JPS55111359A (en) | 1980-08-27 |
Family
ID=11885500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1532179A Pending JPS55111359A (en) | 1979-02-13 | 1979-02-13 | Detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55111359A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153743A (en) * | 1983-02-18 | 1984-09-01 | ハイデルベルガ− ドルツクマシ−ネン アクチエンゲゼルシヤフト | Circuit for optical unit such as paper-sheet monitor device in printer |
| JPS6331050U (en) * | 1986-08-11 | 1988-02-29 | ||
| JPS63185756A (en) * | 1987-01-27 | 1988-08-01 | Fuji Electric Co Ltd | Transported object detection device |
-
1979
- 1979-02-13 JP JP1532179A patent/JPS55111359A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153743A (en) * | 1983-02-18 | 1984-09-01 | ハイデルベルガ− ドルツクマシ−ネン アクチエンゲゼルシヤフト | Circuit for optical unit such as paper-sheet monitor device in printer |
| JPS6331050U (en) * | 1986-08-11 | 1988-02-29 | ||
| JPS63185756A (en) * | 1987-01-27 | 1988-08-01 | Fuji Electric Co Ltd | Transported object detection device |
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