JPS57204647A - Light receiving circuit - Google Patents
Light receiving circuitInfo
- Publication number
- JPS57204647A JPS57204647A JP56089177A JP8917781A JPS57204647A JP S57204647 A JPS57204647 A JP S57204647A JP 56089177 A JP56089177 A JP 56089177A JP 8917781 A JP8917781 A JP 8917781A JP S57204647 A JPS57204647 A JP S57204647A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- apd11
- circuit
- vmin
- light receiving
- 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
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
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
- H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations
Abstract
PURPOSE:To prevent a drop of the response speed for a light receiving circuit, by applying a certain level of voltage to an APD via a gate circuit in case the optical input level is higher than a certain value. CONSTITUTION:The control voltage VC is applied to an APD11 of a light receiving circuit via a high voltage generating circuit 12. As the optical input level increases, the voltage VC lowers in order to decrease the increment factor of the APD11. Accordingly the output voltage of the circuit 12 also lowers, and at the same time the voltage VAPD which is applied to the APD11 also lowers. With the reduction of the voltage VAPD, the increment factor of the APD11 is fixed at 1. Then the response speed of the APD11 is reduced when the increment factor of the APD11 is less than a certain level Vmin. Thus a gate circuit 13 is opened at the level Vmin, and the Vmin is supplied from a constant voltage circuit. As a result, the voltage supplied to the APD11 does not lower less than Vmin to prevent the reduction of the response speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56089177A JPS57204647A (en) | 1981-06-10 | 1981-06-10 | Light receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56089177A JPS57204647A (en) | 1981-06-10 | 1981-06-10 | Light receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57204647A true JPS57204647A (en) | 1982-12-15 |
Family
ID=13963482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56089177A Pending JPS57204647A (en) | 1981-06-10 | 1981-06-10 | Light receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57204647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259430A (en) * | 1985-03-25 | 1986-11-17 | マツクグロウ−エデイソン・カンパニ− | Electric circuit protector and making thereof |
| US6359543B2 (en) | 2000-05-16 | 2002-03-19 | Yazaki Corporation | Fuse |
-
1981
- 1981-06-10 JP JP56089177A patent/JPS57204647A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259430A (en) * | 1985-03-25 | 1986-11-17 | マツクグロウ−エデイソン・カンパニ− | Electric circuit protector and making thereof |
| US6359543B2 (en) | 2000-05-16 | 2002-03-19 | Yazaki Corporation | Fuse |
| US6556120B2 (en) | 2000-05-16 | 2003-04-29 | Yazaki Corporation | Fuse |
| US6753753B2 (en) | 2000-05-16 | 2004-06-22 | Yazaki Corporation | Fuse |
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