JPS57116467A - Original detector - Google Patents
Original detectorInfo
- Publication number
- JPS57116467A JPS57116467A JP56002042A JP204281A JPS57116467A JP S57116467 A JPS57116467 A JP S57116467A JP 56002042 A JP56002042 A JP 56002042A JP 204281 A JP204281 A JP 204281A JP S57116467 A JPS57116467 A JP S57116467A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- converting element
- original
- photoelectric converting
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Geophysics And Detection Of Objects (AREA)
- Facsimiles In General (AREA)
Abstract
PURPOSE:To detect an original or turning off of a fluorescent lamp accurately by a simple circuit, by performing said detection by the amplification output of an operational amplifier which has sufficiently low output impedance. CONSTITUTION:A reference photoelectric converting element C1, a photoelectric converting element C2 for original detection, reference power sources B1, B2 and B3, and operational amplifiers 6, 7 and 9, etc., are provided. A voltage divided through the output feedback photoelectric converting element and a resistor R1 is applied to the inverted-input terminal of the amplifier 6. On the other hand, output of the amplifier 6 is applied to the inverted-input terminal of the amplifier 7 after voltage division through the converting element C2 and a resistance R2. Consequently, the output of the amplifier 7 is used to detect an original 1 entering and a fluorescent lamp 3 is being turned off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56002042A JPS57116467A (en) | 1981-01-12 | 1981-01-12 | Original detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56002042A JPS57116467A (en) | 1981-01-12 | 1981-01-12 | Original detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57116467A true JPS57116467A (en) | 1982-07-20 |
JPS6345550B2 JPS6345550B2 (en) | 1988-09-09 |
Family
ID=11518263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56002042A Granted JPS57116467A (en) | 1981-01-12 | 1981-01-12 | Original detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57116467A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS615055U (en) * | 1984-06-14 | 1986-01-13 | 株式会社東芝 | Original reading device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5356076A (en) * | 1976-10-30 | 1978-05-22 | Nippon Gakki Seizo Kk | Photoelectric conversion system sensor |
-
1981
- 1981-01-12 JP JP56002042A patent/JPS57116467A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5356076A (en) * | 1976-10-30 | 1978-05-22 | Nippon Gakki Seizo Kk | Photoelectric conversion system sensor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS615055U (en) * | 1984-06-14 | 1986-01-13 | 株式会社東芝 | Original reading device |
Also Published As
Publication number | Publication date |
---|---|
JPS6345550B2 (en) | 1988-09-09 |
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