JPS5693427A - Analogue-digital converter - Google Patents

Analogue-digital converter

Info

Publication number
JPS5693427A
JPS5693427A JP17164179A JP17164179A JPS5693427A JP S5693427 A JPS5693427 A JP S5693427A JP 17164179 A JP17164179 A JP 17164179A JP 17164179 A JP17164179 A JP 17164179A JP S5693427 A JPS5693427 A JP S5693427A
Authority
JP
Japan
Prior art keywords
voltage
groups
comparator
analogue
error
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
JP17164179A
Other languages
Japanese (ja)
Inventor
Kenichi Torii
Shoichi Shimizu
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP17164179A priority Critical patent/JPS5693427A/en
Publication of JPS5693427A publication Critical patent/JPS5693427A/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
    • H03M1/14—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 obtain a converter where the conversion error due to the error of the input voltage to comparators is small and the conversion speed can be high and the connection error is small, by using comparator groups, the differential amplifier, analogue switch groups, and so on. CONSTITUTION:Input analogue voltage 11 is compared with the first different reference voltages A (taken out from respective connection points of voltage dividing resistances 14-1-14-4) by comparator groups 13-1-13-3. On a basis of this comparison result, one voltage A is selected by analogue switch groups 17-1-17-4. The differential voltage between this voltage A and voltage 11 is amplified by 18. This output is compared with the second different reference voltages (taken out from respective connection points of voltage dividing resistances 28-1-28-6) at an interval approximately equal to the interval (divided voltage) of voltage A by comparator groups 20-1-20-5. Meanwhile, deviation of the overall gain of one of switch groups 17-1-17-4 and differencial amplifier 18 to the prescribed value is detected by detecting means C (consisting of differential amplifier 31 and comparator 32), and voltage B is controlled by this output. Then, comparison results of comparator groups 13-1-13-4 and 20-1-20-5 are converted to digital codes by 25.
JP17164179A 1979-12-27 1979-12-27 Analogue-digital converter Pending JPS5693427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17164179A JPS5693427A (en) 1979-12-27 1979-12-27 Analogue-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17164179A JPS5693427A (en) 1979-12-27 1979-12-27 Analogue-digital converter

Publications (1)

Publication Number Publication Date
JPS5693427A true JPS5693427A (en) 1981-07-29

Family

ID=15926963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17164179A Pending JPS5693427A (en) 1979-12-27 1979-12-27 Analogue-digital converter

Country Status (1)

Country Link
JP (1) JPS5693427A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230323A (en) * 1983-06-14 1984-12-24 Hiroshi Nakamura High-speed analog/digital converter
JPS60242727A (en) * 1984-02-13 1985-12-02 インタ−シル，インコ−ポレ−テツド Analog-to-digital converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230323A (en) * 1983-06-14 1984-12-24 Hiroshi Nakamura High-speed analog/digital converter
JPS6353739B2 (en) * 1983-06-14 1988-10-25 Hiroshi Nakamura
JPS60242727A (en) * 1984-02-13 1985-12-02 インタ−シル，インコ−ポレ−テツド Analog-to-digital converter
JPH0546126B2 (en) * 1984-02-13 1993-07-13 Intersil Inc

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