JPS5478066A - Ad converter - Google Patents

Ad converter

Info

Publication number
JPS5478066A
JPS5478066A JP14499377A JP14499377A JPS5478066A JP S5478066 A JPS5478066 A JP S5478066A JP 14499377 A JP14499377 A JP 14499377A JP 14499377 A JP14499377 A JP 14499377A JP S5478066 A JPS5478066 A JP S5478066A
Authority
JP
Japan
Prior art keywords
resistances
converter
transistor
reference voltage
counter
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
JP14499377A
Other languages
Japanese (ja)
Inventor
Hisao Hanmura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14499377A priority Critical patent/JPS5478066A/en
Priority to FR7828647A priority patent/FR2405603A1/en
Priority to GB7839652A priority patent/GB2006569A/en
Priority to DE19782843706 priority patent/DE2843706A1/en
Priority to NL7810125A priority patent/NL7810125A/en
Publication of JPS5478066A publication Critical patent/JPS5478066A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enhance an effective resolution for video signals and make operation high-speed with making a circuit scale small, by constituting an AC converter by plural reference voltage generation means, a comparator, an AD converter by plural reference voltage generation means, a comparator, an encoder, a counter and a shift means.
CONSTITUTION: An AD converter is constituted by counter CNT, comparators C1 to C7, logical gates G1 to G4, transistors Q1 and Q2, resistances R1 to T3 and R1 to R3 and R0 to r7, variable resistances VR1 and VR2, etc. In this constitution, vertical synchronizing signals SV are counted in frequency division every input by counter CNT, and counter output FC which is inverted in odd fields and even fields is obtained. Next, output FC is given to the base of transistor Q1 through resistance R1; and when output FC is "1", Q1 is turned on. Meanwhile, since transistor Q2, resistances R2 and R3, and variable resistance VR2 constitute a constant current circuit, the constant current flows from the collector of transistor Q2. As a result, the reference voltage can be taken out from resistances r2 to R7 in seven steps E1 to E7.
COPYRIGHT: (C)1979,JPO&Japio
JP14499377A 1977-10-07 1977-12-05 Ad converter Pending JPS5478066A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP14499377A JPS5478066A (en) 1977-12-05 1977-12-05 Ad converter
FR7828647A FR2405603A1 (en) 1977-10-07 1978-10-06 IMAGE PRESENTATION DEVICE
GB7839652A GB2006569A (en) 1977-10-07 1978-10-06 A flat panel image display system
DE19782843706 DE2843706A1 (en) 1977-10-07 1978-10-06 IMAGE PLAYBACK SYSTEM
NL7810125A NL7810125A (en) 1977-10-07 1978-10-06 IMAGE DISPLAY SYSTEM.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14499377A JPS5478066A (en) 1977-12-05 1977-12-05 Ad converter

Publications (1)

Publication Number Publication Date
JPS5478066A true JPS5478066A (en) 1979-06-21

Family

ID=15374971

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14499377A Pending JPS5478066A (en) 1977-10-07 1977-12-05 Ad converter

Country Status (1)

Country Link
JP (1) JPS5478066A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054527A (en) * 1983-09-05 1985-03-29 Omron Tateisi Electronics Co A/d converting device
JPS60169228A (en) * 1984-02-13 1985-09-02 Victor Co Of Japan Ltd Ad conversion circuit
JPS61293023A (en) * 1985-06-20 1986-12-23 Nec Corp Digital to analog converter
JPS6439830A (en) * 1987-08-05 1989-02-10 Toshiba Corp A/d converter
JPH03101387A (en) * 1990-09-07 1991-04-26 Casio Comput Co Ltd A/d converter for video signal
WO2003065589A1 (en) * 2002-01-28 2003-08-07 Neuro Solution Corp. Analog-digital conversion apparatus
JP4648996B2 (en) * 2000-10-11 2011-03-09 ローム株式会社 Analog-to-digital converter
KR20170113010A (en) 2016-03-29 2017-10-12 세키스이가세이힝코교가부시키가이샤 Polymer particles, and production method and use thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054527A (en) * 1983-09-05 1985-03-29 Omron Tateisi Electronics Co A/d converting device
JPS60169228A (en) * 1984-02-13 1985-09-02 Victor Co Of Japan Ltd Ad conversion circuit
JPH0211182B2 (en) * 1984-02-13 1990-03-13 Victor Company Of Japan
JPS61293023A (en) * 1985-06-20 1986-12-23 Nec Corp Digital to analog converter
JPH0455005B2 (en) * 1985-06-20 1992-09-02 Nippon Electric Co
JPS6439830A (en) * 1987-08-05 1989-02-10 Toshiba Corp A/d converter
JPH03101387A (en) * 1990-09-07 1991-04-26 Casio Comput Co Ltd A/d converter for video signal
JP4648996B2 (en) * 2000-10-11 2011-03-09 ローム株式会社 Analog-to-digital converter
WO2003065589A1 (en) * 2002-01-28 2003-08-07 Neuro Solution Corp. Analog-digital conversion apparatus
KR20170113010A (en) 2016-03-29 2017-10-12 세키스이가세이힝코교가부시키가이샤 Polymer particles, and production method and use thereof

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