JPS57181226A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57181226A
JPS57181226A JP6548581A JP6548581A JPS57181226A JP S57181226 A JPS57181226 A JP S57181226A JP 6548581 A JP6548581 A JP 6548581A JP 6548581 A JP6548581 A JP 6548581A JP S57181226 A JPS57181226 A JP S57181226A
Authority
JP
Japan
Prior art keywords
comparators
analog signal
outputting
switches
detects
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.)
Granted
Application number
JP6548581A
Other languages
Japanese (ja)
Other versions
JPS6135728B2 (en
Inventor
Masahiko Nakajima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6548581A priority Critical patent/JPS57181226A/en
Publication of JPS57181226A publication Critical patent/JPS57181226A/en
Publication of JPS6135728B2 publication Critical patent/JPS6135728B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12Analogue/digital converters
    • H03M1/34Analogue value compared with reference values
    • H03M1/36Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361Analogue 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
    • H03M1/362Analogue 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
    • H03M1/365Analogue 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
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/001Analogue/digital/analogue conversion

Landscapes

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

Abstract

PURPOSE:To reduce the chip area of a parallel A/D converter by obtaining the low-order digit bits by obtaining a local analog signal which corresponds to the high-order digits by 2<n> units of switches, and then finding a difference between a sampled value and the local analog signal. CONSTITUTION:A group of reference voltages and an analog signal are compared mutually by comparators 141-147. Detecting circuits 152-157 find two comparators which output a ''0'' and a ''1''. A detecting circuit 151 detects all the comparators 141-147 outputting ''1''s, and a detector 158 detects all the comparators 141-147 outputting ''0''s. Their detection signals are converted by an encoder 16 into digital signals, which are outputted to output terminals 17. According to those outputs, switches 121-128 operate to lead a prescribed voltage to an output terminal 11.
JP6548581A 1981-04-30 1981-04-30 Analog-to-digital converter Granted JPS57181226A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6548581A JPS57181226A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6548581A JPS57181226A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Publications (2)

Publication Number Publication Date
JPS57181226A true JPS57181226A (en) 1982-11-08
JPS6135728B2 JPS6135728B2 (en) 1986-08-14

Family

ID=13288441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6548581A Granted JPS57181226A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57181226A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6442923A (en) * 1987-08-10 1989-02-15 Nippon Telegraph & Telephone Analog/digital conversion circuit
JPH01202928A (en) * 1988-02-09 1989-08-15 Matsushita Electric Ind Co Ltd Parallel a/d converter
FR2694825A1 (en) * 1991-06-26 1994-02-18 Lanoix Frantz Calculator for non boolean arithmetic calculations - uses circuits operating in octal, hexadecimal or decimal modes but not in binary mode
JPH0690172A (en) * 1992-09-09 1994-03-29 Seiko Instr Inc Circuit device and method for a/d conversion
JPH11274928A (en) * 1999-02-15 1999-10-08 Seiko Instruments Inc Analog-to-digital converter circuit device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6442923A (en) * 1987-08-10 1989-02-15 Nippon Telegraph & Telephone Analog/digital conversion circuit
JPH01202928A (en) * 1988-02-09 1989-08-15 Matsushita Electric Ind Co Ltd Parallel a/d converter
FR2694825A1 (en) * 1991-06-26 1994-02-18 Lanoix Frantz Calculator for non boolean arithmetic calculations - uses circuits operating in octal, hexadecimal or decimal modes but not in binary mode
JPH0690172A (en) * 1992-09-09 1994-03-29 Seiko Instr Inc Circuit device and method for a/d conversion
JPH11274928A (en) * 1999-02-15 1999-10-08 Seiko Instruments Inc Analog-to-digital converter circuit device

Also Published As

Publication number Publication date
JPS6135728B2 (en) 1986-08-14

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