JPS56115925A - Optical signal detecting and amplifying circuit - Google Patents
Optical signal detecting and amplifying circuitInfo
- Publication number
- JPS56115925A JPS56115925A JP2024880A JP2024880A JPS56115925A JP S56115925 A JPS56115925 A JP S56115925A JP 2024880 A JP2024880 A JP 2024880A JP 2024880 A JP2024880 A JP 2024880A JP S56115925 A JPS56115925 A JP S56115925A
- Authority
- JP
- Japan
- Prior art keywords
- groups
- photodiodes
- optical signal
- amplifying circuit
- signal detecting
- 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
- 230000003287 optical effect Effects 0.000 title 1
- 230000003321 amplification Effects 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
- 230000003068 static effect Effects 0.000 abstract 1
- 230000002463 transducing effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
PURPOSE:To improve S/N by dividing photoelectric transducing elements into groups, amplifying an output signal of each group separately and then adding the same. CONSTITUTION:N pieces of photodiodes Is1, Is2...IsN are divided into (n) groups and connected in parallel by N/n pieces, the outputs thereof are amplified separately by the same amplifiers A1-An and the output signals of the amplifiers are added and mixed and are further amplified by an amplifier Ao. Since all photodiodes are connected in groups in accordance with the optimum condition of S/N and subjected to signal amplification, even the photodiodes whose output static capacitance is large and wherefrom only a faint output signal can be obtained can be subjected to the signal amplification at high S/N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024880A JPS56115925A (en) | 1980-02-19 | 1980-02-19 | Optical signal detecting and amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024880A JPS56115925A (en) | 1980-02-19 | 1980-02-19 | Optical signal detecting and amplifying circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56115925A true JPS56115925A (en) | 1981-09-11 |
| JPS6138804B2 JPS6138804B2 (en) | 1986-09-01 |
Family
ID=12021885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2024880A Granted JPS56115925A (en) | 1980-02-19 | 1980-02-19 | Optical signal detecting and amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56115925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618900A1 (en) * | 1987-07-31 | 1989-02-03 | Thomson Csf | LIGHT ALARM SYSTEM WITH LOW FAULT RATE SENSOR, USEFUL FOR LASER DETECTION |
-
1980
- 1980-02-19 JP JP2024880A patent/JPS56115925A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618900A1 (en) * | 1987-07-31 | 1989-02-03 | Thomson Csf | LIGHT ALARM SYSTEM WITH LOW FAULT RATE SENSOR, USEFUL FOR LASER DETECTION |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6138804B2 (en) | 1986-09-01 |
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