JPS57148421A - Nonlinear digital-to-analog converter - Google Patents

Nonlinear digital-to-analog converter

Info

Publication number
JPS57148421A
JPS57148421A JP3356481A JP3356481A JPS57148421A JP S57148421 A JPS57148421 A JP S57148421A JP 3356481 A JP3356481 A JP 3356481A JP 3356481 A JP3356481 A JP 3356481A JP S57148421 A JPS57148421 A JP S57148421A
Authority
JP
Japan
Prior art keywords
gamma
converter
signal
digital
input
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
JP3356481A
Other languages
Japanese (ja)
Inventor
Yuichi Sato
Takashi Nemoto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP3356481A priority Critical patent/JPS57148421A/en
Publication of JPS57148421A publication Critical patent/JPS57148421A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To obtain nonlinearity between an input and an output by converting an input digital code into a different code, and further converting it into an analog value by a linear D/A converter and then outputting it. CONSTITUTION:In the D/A converter of a digital video system, an input digital signal D12 is inputted to a digital code converter 10 for nonlinear conversion, and a digital signal I14 is outputted. The signal I is inputted to a linear D/A converter 11, which output an analog signal A13 which has nonlinear relation to the input digital value D12. This D/A converter has gamma conversion characteristics so that gamma is >=1, and perform the gamma correction of a signal system having the gamma which is >=1. therefore, a gamma compensating circuit is omitted and high- precision gamma compensation effect is obtained.
JP3356481A 1981-03-09 1981-03-09 Nonlinear digital-to-analog converter Pending JPS57148421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3356481A JPS57148421A (en) 1981-03-09 1981-03-09 Nonlinear digital-to-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3356481A JPS57148421A (en) 1981-03-09 1981-03-09 Nonlinear digital-to-analog converter

Publications (1)

Publication Number Publication Date
JPS57148421A true JPS57148421A (en) 1982-09-13

Family

ID=12390035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3356481A Pending JPS57148421A (en) 1981-03-09 1981-03-09 Nonlinear digital-to-analog converter

Country Status (1)

Country Link
JP (1) JPS57148421A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61295721A (en) * 1985-06-21 1986-12-26 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital-analog conversion circuit
JPS639231A (en) * 1986-06-30 1988-01-14 Fujitsu Ltd Digital analog converting method
KR100384872B1 (en) * 2000-12-30 2003-05-22 주식회사 하이닉스반도체 Gamma correction circuit for analog gamma-correction of CMOS image sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61295721A (en) * 1985-06-21 1986-12-26 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital-analog conversion circuit
JPS639231A (en) * 1986-06-30 1988-01-14 Fujitsu Ltd Digital analog converting method
JPH0462617B2 (en) * 1986-06-30 1992-10-07 Fujitsu Ltd
KR100384872B1 (en) * 2000-12-30 2003-05-22 주식회사 하이닉스반도체 Gamma correction circuit for analog gamma-correction of CMOS image sensor

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