JPH01105265U - - Google Patents

Info

Publication number
JPH01105265U
JPH01105265U JP19924587U JP19924587U JPH01105265U JP H01105265 U JPH01105265 U JP H01105265U JP 19924587 U JP19924587 U JP 19924587U JP 19924587 U JP19924587 U JP 19924587U JP H01105265 U JPH01105265 U JP H01105265U
Authority
JP
Japan
Prior art keywords
level
circuit
amplifier
emitter
collector
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
JP19924587U
Other languages
English (en)
Other versions
JPH079482Y2 (ja
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 filed Critical
Priority to JP1987199245U priority Critical patent/JPH079482Y2/ja
Publication of JPH01105265U publication Critical patent/JPH01105265U/ja
Application granted granted Critical
Publication of JPH079482Y2 publication Critical patent/JPH079482Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)

Description

【図面の簡単な説明】
第１図は本考案の実施例を示す回路図、第２図
はその説明に供する波形図、第３図は従来例を示
す回路図である。 ３５は増幅器、３６はトランジスタ、３８はレ
ベル比較回路、５５はサンプルホールド回路であ
る。

Claims (1)

  1. 【実用新案登録請求の範囲】 帰線期間に、基準レベルを有する基準パルスが
    挿入された映像信号の供給される増幅器と、 該増幅器の負帰還回路にコレクタ・エミツタ間
    が挿入されたガンマ補正用のトランジスタと、 上記増幅器の出力中の上記基準パルスのレベル
    を検出するレベル検出回路と、 該レベル検出回路によつて検出された検出レベ
    ルを基準レベルと比較するレベル比較回路とを有
    し、 該レベル比較回路の比較出力を上記トランジス
    タのベースに供給して、そのコレクタ・エミツタ
    間のインピーダンスを制御するようにして成るガ
    ンマ補正回路。
JP1987199245U 1987-12-29 1987-12-29 ガンマ補正回路 Expired - Lifetime JPH079482Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987199245U JPH079482Y2 (ja) 1987-12-29 1987-12-29 ガンマ補正回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987199245U JPH079482Y2 (ja) 1987-12-29 1987-12-29 ガンマ補正回路

Publications (2)

Publication Number Publication Date
JPH01105265U true JPH01105265U (ja) 1989-07-14
JPH079482Y2 JPH079482Y2 (ja) 1995-03-06

Family

ID=31489705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987199245U Expired - Lifetime JPH079482Y2 (ja) 1987-12-29 1987-12-29 ガンマ補正回路

Country Status (1)

Country Link
JP (1) JPH079482Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04337973A (ja) * 1991-05-15 1992-11-25 Fuji Photo Film Co Ltd ガンマ補正回路

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491166A (ja) * 1972-04-17 1974-01-08
JPS6238088A (ja) * 1985-08-12 1987-02-19 Sony Corp テレビジヨン受像機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491166A (ja) * 1972-04-17 1974-01-08
JPS6238088A (ja) * 1985-08-12 1987-02-19 Sony Corp テレビジヨン受像機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04337973A (ja) * 1991-05-15 1992-11-25 Fuji Photo Film Co Ltd ガンマ補正回路

Also Published As

Publication number Publication date
JPH079482Y2 (ja) 1995-03-06

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