JPS6437171A - Luminance signal correction circuit - Google Patents
Luminance signal correction circuitInfo
- Publication number
- JPS6437171A JPS6437171A JP19290787A JP19290787A JPS6437171A JP S6437171 A JPS6437171 A JP S6437171A JP 19290787 A JP19290787 A JP 19290787A JP 19290787 A JP19290787 A JP 19290787A JP S6437171 A JPS6437171 A JP S6437171A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- input
- luminance signal
- input signal
- 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
Landscapes
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To suitably correct a luminance signal without any influence of an input DC voltage by making, by the function of a reference voltage detection circuit, a start voltage to follow an input DC voltage when it is different from the normal one. CONSTITUTION:A sample holding circuit X sample-holds the reference voltage of an input signal. A start voltage setting circuit Y adds a constant voltage to the DC component of the standard voltage generated by the circuit X by dividing the potential difference of a diode 21 by means of a resister. A clipping circuit Z, if an input signal exceeds the start voltage, applies a certain correction to the input signal, so that a corrected signal is outputted to an output terminal (b).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62192907A JP2568569B2 (en) | 1987-07-31 | 1987-07-31 | Brightness signal correction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62192907A JP2568569B2 (en) | 1987-07-31 | 1987-07-31 | Brightness signal correction circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6437171A true JPS6437171A (en) | 1989-02-07 |
JP2568569B2 JP2568569B2 (en) | 1997-01-08 |
Family
ID=16298963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62192907A Expired - Lifetime JP2568569B2 (en) | 1987-07-31 | 1987-07-31 | Brightness signal correction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2568569B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0435577A (en) * | 1990-05-31 | 1992-02-06 | Fujitsu General Ltd | Peak clip circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54167615U (en) * | 1978-05-16 | 1979-11-26 | ||
JPS61120585A (en) * | 1984-11-15 | 1986-06-07 | Matsushita Electric Ind Co Ltd | Synchronizing signal separating and clamping circuit |
-
1987
- 1987-07-31 JP JP62192907A patent/JP2568569B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54167615U (en) * | 1978-05-16 | 1979-11-26 | ||
JPS61120585A (en) * | 1984-11-15 | 1986-06-07 | Matsushita Electric Ind Co Ltd | Synchronizing signal separating and clamping circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0435577A (en) * | 1990-05-31 | 1992-02-06 | Fujitsu General Ltd | Peak clip circuit |
Also Published As
Publication number | Publication date |
---|---|
JP2568569B2 (en) | 1997-01-08 |
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