JPS5593376A - White clip circuit - Google Patents
White clip circuitInfo
- Publication number
- JPS5593376A JPS5593376A JP70679A JP70679A JPS5593376A JP S5593376 A JPS5593376 A JP S5593376A JP 70679 A JP70679 A JP 70679A JP 70679 A JP70679 A JP 70679A JP S5593376 A JPS5593376 A JP S5593376A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- clip
- white
- level
- transistor
- 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
- Picture Signal Circuits (AREA)
Abstract
PURPOSE: To reduce the level difference between the signal level at the start of clip of the white clip circuit limiting the white signal level of video signal and the signal clipped completely.
CONSTITUTION: The input signal fed to the input terminal IN' is clamped with the circuit consisting of the capacitor C11, and diode D11 to obtain the signal waveform A' and it is inputted to the base of the transistor Tr12 constituting the differential amplifier and amplified at the amplifier IC1 and fed to the emitter of Tr14. Since the vase of fixed at the clip potential determined with the variable resistor VR11, only when the white level of the signal entering the emitter exceeds the clip potential, the transistor Tr14 is conductive, and a signal B' appears at the variable resistor VR12, it enters the base of the transistor Tr13, and the signal during the clip period is cancelled at the output OUT' of the differential amplifier and the signal more than the white signal level limited can not be appeared.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP70679A JPS5593376A (en) | 1979-01-10 | 1979-01-10 | White clip circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP70679A JPS5593376A (en) | 1979-01-10 | 1979-01-10 | White clip circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5593376A true JPS5593376A (en) | 1980-07-15 |
Family
ID=11481206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP70679A Pending JPS5593376A (en) | 1979-01-10 | 1979-01-10 | White clip circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5593376A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61157176A (en) * | 1984-12-28 | 1986-07-16 | Rohm Co Ltd | White clip circuit |
US4760450A (en) * | 1985-08-06 | 1988-07-26 | Pioneer Electronic Corporation | Limiter circuit for preventing blooming in a video display terminal |
-
1979
- 1979-01-10 JP JP70679A patent/JPS5593376A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61157176A (en) * | 1984-12-28 | 1986-07-16 | Rohm Co Ltd | White clip circuit |
JPH0736610B2 (en) * | 1984-12-28 | 1995-04-19 | ロ−ム株式会社 | White clip circuit |
US4760450A (en) * | 1985-08-06 | 1988-07-26 | Pioneer Electronic Corporation | Limiter circuit for preventing blooming in a video display terminal |
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