JPS6478539A - Optical receiving circuit - Google Patents
Optical receiving circuitInfo
- Publication number
- JPS6478539A JPS6478539A JP23562787A JP23562787A JPS6478539A JP S6478539 A JPS6478539 A JP S6478539A JP 23562787 A JP23562787 A JP 23562787A JP 23562787 A JP23562787 A JP 23562787A JP S6478539 A JPS6478539 A JP S6478539A
- Authority
- JP
- Japan
- Prior art keywords
- digital data
- speed digital
- low speed
- high speed
- low
- 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
Abstract
PURPOSE:To improve reception sensitivity for both high speed and low speed digital data by providing a high speed digital data receiving preamplifier and a low speed digital data receiving preamplifier in parallel connection for the output from a light receiving element. CONSTITUTION:The high speed data receiving preamplifier 61 set for a wide frequency band whose feedback resistor Rf1 is in a comparatively small value, takes out both high speed digital data and low speed digital data. Also, the low speed data receiving preamplifier 62 set for a low frequency band whose feedback resistor Rf2 is in a comparatively large value, takes out low speed digital data. In such a case, by making the resistor Rf2 large in value, thermal noise can be reduced, and the reception sensitivity for low speed digital data can be enhanced, hence low speed digital data can be correctly taken out. Furthermore, since the amplitude of high speed digital data does not need to be sacrificed, hence high speed digital data also can be taken out correctly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23562787A JPS6478539A (en) | 1987-09-19 | 1987-09-19 | Optical receiving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23562787A JPS6478539A (en) | 1987-09-19 | 1987-09-19 | Optical receiving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478539A true JPS6478539A (en) | 1989-03-24 |
Family
ID=16988813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23562787A Pending JPS6478539A (en) | 1987-09-19 | 1987-09-19 | Optical receiving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478539A (en) |
-
1987
- 1987-09-19 JP JP23562787A patent/JPS6478539A/en active Pending
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