JPS5593376A - White clip circuit - Google Patents

White clip circuit

Info

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
Application number
JP70679A
Other languages
Japanese (ja)
Inventor
Natsuki Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP70679A priority Critical patent/JPS5593376A/en
Publication of JPS5593376A publication Critical patent/JPS5593376A/en
Pending legal-status Critical Current

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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
JP70679A 1979-01-10 1979-01-10 White clip circuit Pending JPS5593376A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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