JPS6422122A - Light reception circuit - Google Patents
Light reception circuitInfo
- Publication number
- JPS6422122A JPS6422122A JP62178335A JP17833587A JPS6422122A JP S6422122 A JPS6422122 A JP S6422122A JP 62178335 A JP62178335 A JP 62178335A JP 17833587 A JP17833587 A JP 17833587A JP S6422122 A JPS6422122 A JP S6422122A
- Authority
- JP
- Japan
- Prior art keywords
- apd
- characteristic
- bias voltage
- current gain
- value
- 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
Landscapes
- Optical Communication System (AREA)
- Light Receiving Elements (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To always operate an APD with the value of an optimum current gain M by separating the APD from an AGC control system. CONSTITUTION:A bias voltage VAPD of an APD bias voltage control circuit 5 makes a current gain M of an APD 1 to constant to a temperature change. On the other hand, the optimum current gain M to make the S/N of the APD 1 maximum has a characteristic in which it is reduced to the rise of the light input level little by little. Since the voltage control circuit 5 is not included in an AGC control system, the circuit is not related to the change of the light input level and a flat M characteristic is obtained. Consequently, by setting suitably the value of the bias voltage VAPD, the M characteristic can be made close to the more optimum value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62178335A JPS6422122A (en) | 1987-07-17 | 1987-07-17 | Light reception circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62178335A JPS6422122A (en) | 1987-07-17 | 1987-07-17 | Light reception circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6422122A true JPS6422122A (en) | 1989-01-25 |
Family
ID=16046690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62178335A Pending JPS6422122A (en) | 1987-07-17 | 1987-07-17 | Light reception circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6422122A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5625181A (en) * | 1994-01-12 | 1997-04-29 | Fujitsu Limited | Light-receipt system with current bias circuit and pre-amplifier for use in optical digital communication |
| JP2006303524A (en) * | 2006-06-08 | 2006-11-02 | Oki Comtec Ltd | Bias voltage control circuit for avalanche photodiode and its adjusting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5995711A (en) * | 1982-11-24 | 1984-06-01 | Yokogawa Hokushin Electric Corp | Driving circuit of avalanche photodiode |
| JPS6079839A (en) * | 1983-10-07 | 1985-05-07 | Nec Corp | Optical reception circuit |
| JPS60180347A (en) * | 1984-02-28 | 1985-09-14 | Fujitsu Ltd | Temperature compensating circuit of avalanche photo diode |
| JPS6187440A (en) * | 1984-10-04 | 1986-05-02 | Seiko Epson Corp | Optical signal detection device |
-
1987
- 1987-07-17 JP JP62178335A patent/JPS6422122A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5995711A (en) * | 1982-11-24 | 1984-06-01 | Yokogawa Hokushin Electric Corp | Driving circuit of avalanche photodiode |
| JPS6079839A (en) * | 1983-10-07 | 1985-05-07 | Nec Corp | Optical reception circuit |
| JPS60180347A (en) * | 1984-02-28 | 1985-09-14 | Fujitsu Ltd | Temperature compensating circuit of avalanche photo diode |
| JPS6187440A (en) * | 1984-10-04 | 1986-05-02 | Seiko Epson Corp | Optical signal detection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5625181A (en) * | 1994-01-12 | 1997-04-29 | Fujitsu Limited | Light-receipt system with current bias circuit and pre-amplifier for use in optical digital communication |
| JP2006303524A (en) * | 2006-06-08 | 2006-11-02 | Oki Comtec Ltd | Bias voltage control circuit for avalanche photodiode and its adjusting method |
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