JPS57199371A - Gamma correcting circuit - Google Patents

Gamma correcting circuit

Info

Publication number
JPS57199371A
JPS57199371A JP56084410A JP8441081A JPS57199371A JP S57199371 A JPS57199371 A JP S57199371A JP 56084410 A JP56084410 A JP 56084410A JP 8441081 A JP8441081 A JP 8441081A JP S57199371 A JPS57199371 A JP S57199371A
Authority
JP
Japan
Prior art keywords
voltage
collector
connecting point
diode
common
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
JP56084410A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0419750B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Michitaka Osawa
Hitoshi Maekawa
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56084410A priority Critical patent/JPS57199371A/ja
Priority to US06/384,716 priority patent/US4480268A/en
Publication of JPS57199371A publication Critical patent/JPS57199371A/ja
Publication of JPH0419750B2 publication Critical patent/JPH0419750B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
JP56084410A 1981-06-03 1981-06-03 Gamma correcting circuit Granted JPS57199371A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56084410A JPS57199371A (en) 1981-06-03 1981-06-03 Gamma correcting circuit
US06/384,716 US4480268A (en) 1981-06-03 1982-06-02 Gamma correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084410A JPS57199371A (en) 1981-06-03 1981-06-03 Gamma correcting circuit

Publications (2)

Publication Number Publication Date
JPS57199371A true JPS57199371A (en) 1982-12-07
JPH0419750B2 JPH0419750B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-03-31

Family

ID=13829814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084410A Granted JPS57199371A (en) 1981-06-03 1981-06-03 Gamma correcting circuit

Country Status (2)

Country Link
US (1) US4480268A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS57199371A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3774295D1 (de) * 1986-03-07 1991-12-12 Philips Nv Gamma-korrekturschaltung.
JPH071924B2 (ja) * 1986-12-22 1995-01-11 富士写真フイルム株式会社 映像信号エツジ強調処理装置
KR940025290A (ko) * 1993-04-21 1994-11-19 배순훈 트랜지스터의 증폭도를 이용한 감마 보정회로

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336010U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-09-02 1978-03-30

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117909B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1970-12-16 1976-12-03 Fernseh Gmbh
US4015079A (en) * 1973-06-12 1977-03-29 Tokyo Shibaura Electric Co., Ltd. Gamma correction circuit
US4278839A (en) * 1979-08-02 1981-07-14 Motorola, Inc. Tangent function generator for AM stereo

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336010U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-09-02 1978-03-30

Also Published As

Publication number Publication date
JPH0419750B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-03-31
US4480268A (en) 1984-10-30

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