JPS57106224A - Analogue-digital converter device - Google Patents

Analogue-digital converter device

Info

Publication number
JPS57106224A
JPS57106224A JP18199080A JP18199080A JPS57106224A JP S57106224 A JPS57106224 A JP S57106224A JP 18199080 A JP18199080 A JP 18199080A JP 18199080 A JP18199080 A JP 18199080A JP S57106224 A JPS57106224 A JP S57106224A
Authority
JP
Japan
Prior art keywords
hysteresis
comparator
amplifier
output
led out
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
JP18199080A
Other languages
Japanese (ja)
Inventor
Masanori Ogino
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 JP18199080A priority Critical patent/JPS57106224A/en
Publication of JPS57106224A publication Critical patent/JPS57106224A/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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
    • 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 prevent the occurrence of oscillated digital noise, by feeding back the output positively to each comparator to give a hysteresis. CONSTITUTION:Positive feedback resistances RF1, RF2, RF3... and base resistances RB1, RB2, RB3... are connected additionally to respective comparators. Resistance values are so selected that the magnitude of a hysteresis which can be generated by output inversion of one comparator is about 1 LSB (Least Significant Bit). As the result, the input/output characteristic shown in figure is obtained. The feedback resistance RF must be led out immediately from the collector side of a transistor Qn'. If the feedback resistance RF is led out from the succeeding part of the amplifier of an emitter follower or the like in the succeeding logical operation circuit, a new parasitic oscillation is probably caused by the influence of the delay time of the amplifier.
JP18199080A 1980-12-24 1980-12-24 Analogue-digital converter device Pending JPS57106224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18199080A JPS57106224A (en) 1980-12-24 1980-12-24 Analogue-digital converter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18199080A JPS57106224A (en) 1980-12-24 1980-12-24 Analogue-digital converter device

Publications (1)

Publication Number Publication Date
JPS57106224A true JPS57106224A (en) 1982-07-02

Family

ID=16110387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18199080A Pending JPS57106224A (en) 1980-12-24 1980-12-24 Analogue-digital converter device

Country Status (1)

Country Link
JP (1) JPS57106224A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6429925U (en) * 1987-08-13 1989-02-22
JPH0160271U (en) * 1987-10-14 1989-04-17
JPH03104496U (en) * 1990-02-16 1991-10-30
JPH04170226A (en) * 1990-11-02 1992-06-17 Nec Ic Microcomput Syst Ltd A/d converter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298456A (en) * 1976-02-12 1977-08-18 Tektronix Inc Analoggtoodigital converter
JPS5432958A (en) * 1977-08-19 1979-03-10 Mitsubishi Electric Corp Comparator circuit
JPS5475213A (en) * 1977-11-29 1979-06-15 Toshiba Corp Analogue input signal digital converter
JPS5596727A (en) * 1979-01-17 1980-07-23 Hitachi Ltd Successive comparison-type a/d converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298456A (en) * 1976-02-12 1977-08-18 Tektronix Inc Analoggtoodigital converter
JPS5432958A (en) * 1977-08-19 1979-03-10 Mitsubishi Electric Corp Comparator circuit
JPS5475213A (en) * 1977-11-29 1979-06-15 Toshiba Corp Analogue input signal digital converter
JPS5596727A (en) * 1979-01-17 1980-07-23 Hitachi Ltd Successive comparison-type a/d converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6429925U (en) * 1987-08-13 1989-02-22
JPH0160271U (en) * 1987-10-14 1989-04-17
JPH03104496U (en) * 1990-02-16 1991-10-30
JPH04170226A (en) * 1990-11-02 1992-06-17 Nec Ic Microcomput Syst Ltd A/d converter

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