JPS5686530A - Parallel type a/d converter - Google Patents

Parallel type a/d converter

Info

Publication number
JPS5686530A
JPS5686530A JP16282679A JP16282679A JPS5686530A JP S5686530 A JPS5686530 A JP S5686530A JP 16282679 A JP16282679 A JP 16282679A JP 16282679 A JP16282679 A JP 16282679A JP S5686530 A JPS5686530 A JP S5686530A
Authority
JP
Japan
Prior art keywords
parallel type
converter
resistance
bit parallel
sets
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
JP16282679A
Other languages
Japanese (ja)
Inventor
Kengo Fujita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16282679A priority Critical patent/JPS5686530A/en
Publication of JPS5686530A publication Critical patent/JPS5686530A/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
    • H03M1/12—Analogue/digital converters
    • H03M1/20—Increasing resolution using an n bit system to obtain n + m bits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
    • H03M1/145—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit the steps being performed sequentially in series-connected stages
    • H03M1/146—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit the steps being performed sequentially in series-connected stages all stages being simultaneous converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
    • H03M1/362—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider
    • H03M1/365—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider the voltage divider being a single resistor string

Landscapes

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

Abstract

PURPOSE:To achieve the converter with one reference analog voltage source, by connecting a resistance for level shift across the reference voltage dividing resistance group, in (N+a)-bit parallel type of converter using 2<a> sets of N-bit parallel type A/D converters. CONSTITUTION:In constituting (N+a)-bit parallel type A/D converter by using 2<a> sets of N-bit parallel type A/D converters, an analog input signal Ain is converted into the signal Dout in (N+a)-bit via N-bit parallel type A/D converters 11, 12. Each A/D converter consists of (N-1) sets of comparators 13-1, 13-2, decoder circuits 14-1, 14-2 and reference voltage dividing resistance groups 15-1, 15-2 which supply the reference analog voltage corresponding to each comparator, and the level shift resistance having 1/2<a> of resistance value of one resistance 1 is connected across the reference voltage dividing resistance group respectively by (2<a>-1) sets in series, and common reference analog voltage is fed respectively to B1, B2, D1, and D2 of each series connecting point.
JP16282679A 1979-12-17 1979-12-17 Parallel type a/d converter Pending JPS5686530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16282679A JPS5686530A (en) 1979-12-17 1979-12-17 Parallel type a/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16282679A JPS5686530A (en) 1979-12-17 1979-12-17 Parallel type a/d converter

Publications (1)

Publication Number Publication Date
JPS5686530A true JPS5686530A (en) 1981-07-14

Family

ID=15761960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16282679A Pending JPS5686530A (en) 1979-12-17 1979-12-17 Parallel type a/d converter

Country Status (1)

Country Link
JP (1) JPS5686530A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911024A (en) * 1982-07-12 1984-01-20 Mitsubishi Electric Corp Analog-digital converter
JPS60146528A (en) * 1984-01-11 1985-08-02 Nec Corp Analog-digital converting circuit
JP2009267808A (en) * 2008-04-25 2009-11-12 Nippon Telegr & Teleph Corp <Ntt> Analog-digital conversion circuit
JP2013251868A (en) * 2012-06-04 2013-12-12 Fujitsu Ltd Ad converter and electronic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911024A (en) * 1982-07-12 1984-01-20 Mitsubishi Electric Corp Analog-digital converter
JPS60146528A (en) * 1984-01-11 1985-08-02 Nec Corp Analog-digital converting circuit
JP2009267808A (en) * 2008-04-25 2009-11-12 Nippon Telegr & Teleph Corp <Ntt> Analog-digital conversion circuit
JP2013251868A (en) * 2012-06-04 2013-12-12 Fujitsu Ltd Ad converter and electronic device

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