JPS53133323A - Video keying amplifier circuit - Google Patents

Video keying amplifier circuit

Info

Publication number
JPS53133323A
JPS53133323A JP4920477A JP4920477A JPS53133323A JP S53133323 A JPS53133323 A JP S53133323A JP 4920477 A JP4920477 A JP 4920477A JP 4920477 A JP4920477 A JP 4920477A JP S53133323 A JPS53133323 A JP S53133323A
Authority
JP
Japan
Prior art keywords
amplifier circuit
potential
video keying
keying amplifier
video
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
Application number
JP4920477A
Other languages
Japanese (ja)
Other versions
JPS6034867B2 (en
Inventor
Takashi Mizuguchi
Shunichi Yamamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4920477A priority Critical patent/JPS6034867B2/en
Publication of JPS53133323A publication Critical patent/JPS53133323A/en
Publication of JPS6034867B2 publication Critical patent/JPS6034867B2/en
Expired legal-status Critical Current

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  • Studio Circuits (AREA)

Abstract

PURPOSE: To reduce the shift of the black balance caused by the fluctuation of the potential of the using transistor or the clamp potential, by keeping the clamp reference potential identical to the potential of the video signal input part.
COPYRIGHT: (C)1978,JPO&Japio
JP4920477A 1977-04-27 1977-04-27 Video keying amplifier circuit Expired JPS6034867B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4920477A JPS6034867B2 (en) 1977-04-27 1977-04-27 Video keying amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4920477A JPS6034867B2 (en) 1977-04-27 1977-04-27 Video keying amplifier circuit

Publications (2)

Publication Number Publication Date
JPS53133323A true JPS53133323A (en) 1978-11-21
JPS6034867B2 JPS6034867B2 (en) 1985-08-10

Family

ID=12824452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4920477A Expired JPS6034867B2 (en) 1977-04-27 1977-04-27 Video keying amplifier circuit

Country Status (1)

Country Link
JP (1) JPS6034867B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57122979U (en) * 1981-01-27 1982-07-31

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62192757U (en) * 1986-05-28 1987-12-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57122979U (en) * 1981-01-27 1982-07-31

Also Published As

Publication number Publication date
JPS6034867B2 (en) 1985-08-10

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