JPS55127767A - Shading correction circuit - Google Patents
Shading correction circuitInfo
- Publication number
- JPS55127767A JPS55127767A JP3592879A JP3592879A JPS55127767A JP S55127767 A JPS55127767 A JP S55127767A JP 3592879 A JP3592879 A JP 3592879A JP 3592879 A JP3592879 A JP 3592879A JP S55127767 A JPS55127767 A JP S55127767A
- Authority
- JP
- Japan
- Prior art keywords
- fet4
- photoelectric conversion
- signal
- conversion signal
- shading correction
- 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
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE: To perform shading correction requiring no sampling and clamp processings, by changing uniformly the amplification degree of the amplifying circuit of a photoelectric conversion signal from a DC to a picture element frequency.
CONSTITUTION: A symmetrical FET is used as FET4, and photoelectric conversion signal Vi (a) is inputted with the reference level set to the earth potential. Signal Vi is voltage-divided by resistance R1 and resistance r between the drain and the source of FET4 and is applied to drain terminal D. The amplification degree can be changed uniformly from a DC to a picture frequency according to the waveform of Vs by applying control signal Vs (b) to gate terminal G of FET4 under the state above, so that shading of photoelectric conversion signal Vi can be corrected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3592879A JPS55127767A (en) | 1979-03-24 | 1979-03-24 | Shading correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3592879A JPS55127767A (en) | 1979-03-24 | 1979-03-24 | Shading correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55127767A true JPS55127767A (en) | 1980-10-02 |
Family
ID=12455688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3592879A Pending JPS55127767A (en) | 1979-03-24 | 1979-03-24 | Shading correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55127767A (en) |
-
1979
- 1979-03-24 JP JP3592879A patent/JPS55127767A/en active Pending
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