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JPS57129526A - Parallel type analog-to-digital converter - Google Patents

Parallel type analog-to-digital converter

Info

Publication number
JPS57129526A
JPS57129526A JP1547581A JP1547581A JPS57129526A JP S57129526 A JPS57129526 A JP S57129526A JP 1547581 A JP1547581 A JP 1547581A JP 1547581 A JP1547581 A JP 1547581A JP S57129526 A JPS57129526 A JP S57129526A
Authority
JP
Japan
Prior art keywords
conversion
result
state
digital converter
switch
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
JP1547581A
Other languages
Japanese (ja)
Inventor
Hirohisa Karibe
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 JP1547581A priority Critical patent/JPS57129526A/en
Publication of JPS57129526A publication Critical patent/JPS57129526A/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
    • H03M1/34—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 increase the digital output by a bit, by connecting the resistances of the same value to the resistances provided across a resistance train which supplies the reference potential via switches. CONSTITUTION:First, a switch SW1 is closed with a switch SW2 opened to carry out an A/D conversion, and the result of this conversion is held at a decoder circuit 1'. Then the state is reversed between the switches SW1 and SW2 to carry out an A/D conversion, and the result of this conversion is applied to the circuit 1' to receive a code conversion together with the result of the preceding conversion. As a result, a conversion of (N+1) bits is possible with increase of one bit compared with the conventional conversion. In case the analog input voltage has a extensive change by a shift between the time point of A/D conversion in the 1st state and that in the 2nd state, a sample holding circuit 2 is connected to the front stage of an A/D converter 3.
JP1547581A 1981-02-04 1981-02-04 Parallel type analog-to-digital converter Pending JPS57129526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1547581A JPS57129526A (en) 1981-02-04 1981-02-04 Parallel type analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1547581A JPS57129526A (en) 1981-02-04 1981-02-04 Parallel type analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57129526A true JPS57129526A (en) 1982-08-11

Family

ID=11889820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1547581A Pending JPS57129526A (en) 1981-02-04 1981-02-04 Parallel type analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57129526A (en)

Cited By (4)

* 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
JPS60146528A (en) * 1984-01-11 1985-08-02 Nec Corp Analog-digital converting circuit
JPS61293023A (en) * 1985-06-20 1986-12-23 Nec Corp Digital to analog converter
JPS6259418A (en) * 1985-09-10 1987-03-16 Ascii Corp Analog-digital conversion circuit

Cited By (6)

* 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
JPS60146528A (en) * 1984-01-11 1985-08-02 Nec Corp Analog-digital converting circuit
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
JPS6259418A (en) * 1985-09-10 1987-03-16 Ascii Corp Analog-digital conversion circuit
JPH0243374B2 (en) * 1985-09-10 1990-09-28

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