JPH0379563U - - Google Patents

Info

Publication number
JPH0379563U
JPH0379563U JP14151189U JP14151189U JPH0379563U JP H0379563 U JPH0379563 U JP H0379563U JP 14151189 U JP14151189 U JP 14151189U JP 14151189 U JP14151189 U JP 14151189U JP H0379563 U JPH0379563 U JP H0379563U
Authority
JP
Japan
Prior art keywords
signal
reference voltage
white
converter
conversion circuit
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
JP14151189U
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 JP14151189U priority Critical patent/JPH0379563U/ja
Publication of JPH0379563U publication Critical patent/JPH0379563U/ja
Pending legal-status Critical Current

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Landscapes

  • Facsimile Image Signal Circuits (AREA)

Description

【図面の簡単な説明】
第１図は本考案のＡ／Ｄ変換回路の実施例を示
すブロツク図、第２図は同Ａ／Ｄ変換回路におけ
る入力信号と基準電圧との関係を示すグラフ、第
３図は従来のＡ／Ｄ変換回路の構成例を示すブロ
ツク図、第４図は従来のＡ／Ｄ変換回路における
入力信号と基準電圧との関係を示すグラフである
。 １……Ａ／Ｄ変換器、２……演算器、３……ラ
インメモリ、４……Ｄ／Ａ変換器、５……減衰器
。

Claims (1)

    【実用新案登録請求の範囲】
  1. 画像信号が供給されるＡ／Ｄ変換器の正方向の
    基準電圧として基準白色を読み取つて得た基準白
    信号に応じた信号を与え、前記Ａ／Ｄ変換器の負
    方向の基準電圧として前記基準白信号に応じた信
    号を減衰させた信号を与えたことを特徴とする画
    像読み取り装置のＡ／Ｄ変換回路。
JP14151189U 1989-12-05 1989-12-05 Pending JPH0379563U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14151189U JPH0379563U (ja) 1989-12-05 1989-12-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14151189U JPH0379563U (ja) 1989-12-05 1989-12-05

Publications (1)

Publication Number Publication Date
JPH0379563U true JPH0379563U (ja) 1991-08-14

Family

ID=31688399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14151189U Pending JPH0379563U (ja) 1989-12-05 1989-12-05

Country Status (1)

Country Link
JP (1) JPH0379563U (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58106957A (ja) * 1981-12-18 1983-06-25 Ricoh Co Ltd 画像読取装置
JPS60169273A (ja) * 1984-02-13 1985-09-02 Fuji Xerox Co Ltd 画信号処理装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58106957A (ja) * 1981-12-18 1983-06-25 Ricoh Co Ltd 画像読取装置
JPS60169273A (ja) * 1984-02-13 1985-09-02 Fuji Xerox Co Ltd 画信号処理装置

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