JPS5784620A - A-d converter - Google Patents

A-d converter

Info

Publication number
JPS5784620A
JPS5784620A JP16029280A JP16029280A JPS5784620A JP S5784620 A JPS5784620 A JP S5784620A JP 16029280 A JP16029280 A JP 16029280A JP 16029280 A JP16029280 A JP 16029280A JP S5784620 A JPS5784620 A JP S5784620A
Authority
JP
Japan
Prior art keywords
voltage
input terminal
conversion
comparators
circuit
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
JP16029280A
Other languages
Japanese (ja)
Inventor
Koji Takayama
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.)
Advantest Corp
Original Assignee
Advantest Corp
Takeda Riken Industries 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 Advantest Corp, Takeda Riken Industries Co Ltd filed Critical Advantest Corp
Priority to JP16029280A priority Critical patent/JPS5784620A/en
Publication of JPS5784620A publication Critical patent/JPS5784620A/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
    • H03M1/144—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 a single stage, i.e. recirculation type
    • 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 an A-D conversion with high accuracy, even with less number of comparators, by performing upper rank A-D conversion with a basic voltage division circuit and providing a subvoltage division circuit having a voltage division pitch slightly different from the voltage division pitch. CONSTITUTION:A switch circuit 211 is operated so that an analog voltage Vx applied to an input terminal 113 is applied to one input terminal of comparators 111a-111n of a comparator 111, and the Vx is compared with voltage division voltages V1-Vn of a main voltage division circuit 112. As a result, the voltage is converted into a digital value and stored in a register 115. The result of conversion of the decoder 114 is applied to also a switch circuit 211, and an input terminal 113 is connected to an input terminal of the comparator detecting the most significant digit at conversion, and the voltage divided voltage of the subvoltage division circuit 212 is applied to the upper or lower side comparator, by taking the input terminal as the reference. Thus, high resolution can be obtained even with less number of comparators and the accuracy can be increased.
JP16029280A 1980-11-14 1980-11-14 A-d converter Pending JPS5784620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16029280A JPS5784620A (en) 1980-11-14 1980-11-14 A-d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16029280A JPS5784620A (en) 1980-11-14 1980-11-14 A-d converter

Publications (1)

Publication Number Publication Date
JPS5784620A true JPS5784620A (en) 1982-05-27

Family

ID=15711820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16029280A Pending JPS5784620A (en) 1980-11-14 1980-11-14 A-d converter

Country Status (1)

Country Link
JP (1) JPS5784620A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119097A (en) * 1987-08-13 1992-06-02 Nissan Motor Company, Limited Analog-to-digital converter having decreased reference voltage to reduce display flicker
WO2006126338A1 (en) * 2005-05-27 2006-11-30 Fuetrek Co., Ltd Analog/digital converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119097A (en) * 1987-08-13 1992-06-02 Nissan Motor Company, Limited Analog-to-digital converter having decreased reference voltage to reduce display flicker
WO2006126338A1 (en) * 2005-05-27 2006-11-30 Fuetrek Co., Ltd Analog/digital converter
US7391353B2 (en) 2005-05-27 2008-06-24 Fuetrek Co., Ltd. Analog/digital converter

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