JPS57192125A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57192125A
JPS57192125A JP7694481A JP7694481A JPS57192125A JP S57192125 A JPS57192125 A JP S57192125A JP 7694481 A JP7694481 A JP 7694481A JP 7694481 A JP7694481 A JP 7694481A JP S57192125 A JPS57192125 A JP S57192125A
Authority
JP
Japan
Prior art keywords
counter
conversion
sets
counters
bit
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
JP7694481A
Other languages
Japanese (ja)
Inventor
Takahide Ueno
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 JP7694481A priority Critical patent/JPS57192125A/en
Publication of JPS57192125A publication Critical patent/JPS57192125A/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
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval
    • H03M1/56—Input signal compared with linear ramp

Landscapes

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

Abstract

PURPOSE:To reduce the converting time, by executing the change of an up/down counter from the high-order bit. CONSTITUTION:m Sets of up/down counters 8-11 of n bits per one counter are used and the conversion of N bits (N=m.n) is made by splitting the conversion into m sets. m Sets of the 1st- the m-th counters 8-11 correspond respectively from the minimum bit to the maximum bit. First, a controller 6 operates only the counter 11 at the most significant bit and converges counted values coarsely to an analog input value inputted from a terminal 21. Next, the controller 6 converges with the fineness set upward by one step by operating the (m-1)th counter 10. This operation is repeated similarly and convergence is made in the accuracy of 1/2N to complete the conversion. The content of the counters 8-11 is picked up as an output. Thus, the converting time can be improved to 2<n->N m times.
JP7694481A 1981-05-21 1981-05-21 Analog-to-digital converter Pending JPS57192125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7694481A JPS57192125A (en) 1981-05-21 1981-05-21 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7694481A JPS57192125A (en) 1981-05-21 1981-05-21 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57192125A true JPS57192125A (en) 1982-11-26

Family

ID=13619853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7694481A Pending JPS57192125A (en) 1981-05-21 1981-05-21 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57192125A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60143024A (en) * 1983-12-29 1985-07-29 Tokyo Sokki Kenkyusho:Kk Follow-up comparison type a-d converter
JPS63262921A (en) * 1987-04-20 1988-10-31 Nec Corp A/d conversion circuit
JPS63269616A (en) * 1987-04-27 1988-11-07 Shimadzu Corp Lamp wave signal generator
WO2001018971A3 (en) * 1999-09-06 2001-06-14 Infineon Technologies Ag Hunting analog-digital converter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4977563A (en) * 1972-11-27 1974-07-26
JPS5591233A (en) * 1978-12-28 1980-07-10 Fujitsu Ltd Successive comparison type a/d converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4977563A (en) * 1972-11-27 1974-07-26
JPS5591233A (en) * 1978-12-28 1980-07-10 Fujitsu 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
JPS60143024A (en) * 1983-12-29 1985-07-29 Tokyo Sokki Kenkyusho:Kk Follow-up comparison type a-d converter
JPS63262921A (en) * 1987-04-20 1988-10-31 Nec Corp A/d conversion circuit
JPS63269616A (en) * 1987-04-27 1988-11-07 Shimadzu Corp Lamp wave signal generator
WO2001018971A3 (en) * 1999-09-06 2001-06-14 Infineon Technologies Ag Hunting analog-digital converter

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