JPS6478525A - Offset gain adjusting circuit - Google Patents

Offset gain adjusting circuit

Info

Publication number
JPS6478525A
JPS6478525A JP23495387A JP23495387A JPS6478525A JP S6478525 A JPS6478525 A JP S6478525A JP 23495387 A JP23495387 A JP 23495387A JP 23495387 A JP23495387 A JP 23495387A JP S6478525 A JPS6478525 A JP S6478525A
Authority
JP
Japan
Prior art keywords
converter
offset
histogram
adjusting
generates
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
JP23495387A
Other languages
Japanese (ja)
Inventor
Kazunari Kawamura
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP23495387A priority Critical patent/JPS6478525A/en
Publication of JPS6478525A publication Critical patent/JPS6478525A/en
Pending legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To attain the operation of an A/D converter with a condition always suited to the ambient condition by providing a means supplying a command signal for adjusting offset and a means generating a command signal for adjusting gain to an A/D converter. CONSTITUTION:A histogram generating section 5, based on data stored in a storage section 4, generates a histogram. A 1st discrimination section 6 detects an offset based on the generated histogram and generates offset adjusting data DOF based in the offset. Moreover, a 2nd discrimination section 7 detects the unadjusted quantity of the gain based on the histogram and generates adjusting data DG. A D/A converter 8 applies analog conversion to the data DOF and DG and supplies the result to the amplifier 1 and the A/D converter 2 respectively. Thus, the converter 2 is operated at an optimum condition at all times.
JP23495387A 1987-09-21 1987-09-21 Offset gain adjusting circuit Pending JPS6478525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23495387A JPS6478525A (en) 1987-09-21 1987-09-21 Offset gain adjusting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23495387A JPS6478525A (en) 1987-09-21 1987-09-21 Offset gain adjusting circuit

Publications (1)

Publication Number Publication Date
JPS6478525A true JPS6478525A (en) 1989-03-24

Family

ID=16978846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23495387A Pending JPS6478525A (en) 1987-09-21 1987-09-21 Offset gain adjusting circuit

Country Status (1)

Country Link
JP (1) JPS6478525A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685706A1 (en) * 1994-06-03 1995-12-06 Robert Bosch Gmbh Method for determining the offset-portion of a measuring signal in real time
WO2002028089A3 (en) * 2000-09-25 2002-06-13 Infocus Corp Image luminance detection and correction employing histograms
JP2016140388A (en) * 2015-01-30 2016-08-08 株式会社ニデック Ocular fundus imaging apparatus
JP2017076960A (en) * 2015-10-02 2017-04-20 インフィネオン テクノロジーズ アーゲーＩｎｆｉｎｅｏｎ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ａｇ Device and method for testing analog-to-digital converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685706A1 (en) * 1994-06-03 1995-12-06 Robert Bosch Gmbh Method for determining the offset-portion of a measuring signal in real time
WO2002028089A3 (en) * 2000-09-25 2002-06-13 Infocus Corp Image luminance detection and correction employing histograms
US6559837B1 (en) 2000-09-25 2003-05-06 Infocus Corporation Image luminance detection and correction employing histograms
JP2016140388A (en) * 2015-01-30 2016-08-08 株式会社ニデック Ocular fundus imaging apparatus
JP2017076960A (en) * 2015-10-02 2017-04-20 インフィネオン テクノロジーズ アーゲーＩｎｆｉｎｅｏｎ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ａｇ Device and method for testing analog-to-digital converter

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