JPH01147571U - - Google Patents

Info

Publication number
JPH01147571U
JPH01147571U JP4380488U JP4380488U JPH01147571U JP H01147571 U JPH01147571 U JP H01147571U JP 4380488 U JP4380488 U JP 4380488U JP 4380488 U JP4380488 U JP 4380488U JP H01147571 U JPH01147571 U JP H01147571U
Authority
JP
Japan
Prior art keywords
circuit
variable gain
predetermined level
peak suppression
white peak
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
JP4380488U
Other languages
English (en)
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 JP4380488U priority Critical patent/JPH01147571U/ja
Publication of JPH01147571U publication Critical patent/JPH01147571U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例の白ピーク抑圧回路
の構成を前後の関連回路と共に示す回路図、第2
図は上記実施例の白ピーク抑圧回路の動作を説明
するための概念図である。 1…白ピーク抑圧回路、2…クランプ回路、3
…出力増幅回路、4…ACL(自動コントラスト
・リミタ)回路、Q1〜Q5…可変利得増幅回路
、R1〜R3…可変利得設定用抵抗器、v…入力
映像信号の瞬時値、V…出力映像信号の瞬時値、
vth…可変利得増幅回路の利得変化点、APL
…平均画像レベル。

Claims (1)

  1. 【実用新案登録請求の範囲】 増幅対象の画像信号のうち所定レベル以上につ
    いては増幅利得を低下させる可変利得増幅回路と
    、 この可変利得増幅回路の前記所定レベルを平均
    画像レベルの増加と共に減少させる手段とを備え
    たことを特徴とする白ピーク抑圧回路。
JP4380488U 1988-03-31 1988-03-31 Pending JPH01147571U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4380488U JPH01147571U (ja) 1988-03-31 1988-03-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4380488U JPH01147571U (ja) 1988-03-31 1988-03-31

Publications (1)

Publication Number Publication Date
JPH01147571U true JPH01147571U (ja) 1989-10-12

Family

ID=31270191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4380488U Pending JPH01147571U (ja) 1988-03-31 1988-03-31

Country Status (1)

Country Link
JP (1) JPH01147571U (ja)

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