JPS57181227A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57181227A
JPS57181227A JP6579781A JP6579781A JPS57181227A JP S57181227 A JPS57181227 A JP S57181227A JP 6579781 A JP6579781 A JP 6579781A JP 6579781 A JP6579781 A JP 6579781A JP S57181227 A JPS57181227 A JP S57181227A
Authority
JP
Japan
Prior art keywords
output
circuit
pulse
frequency divider
frequency
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
JP6579781A
Other languages
Japanese (ja)
Other versions
JPS6255733B2 (en
Inventor
Hisao Nakane
Mamoru Sanagi
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP6579781A priority Critical patent/JPS57181227A/en
Publication of JPS57181227A publication Critical patent/JPS57181227A/en
Publication of JPS6255733B2 publication Critical patent/JPS6255733B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To increase the response speed of an A/D converter, and to improve resolution by providing a frequency dividing circuit which divides the frequency of driving pulses on receiving a start signal, and then counting its output by a counting circuit. CONSTITUTION:The output QA of a 1/2 frequency divider 13 rises synchronizing with the 5th rise of a pulse P1. Therefore, the 1st-4th pulses before a system is balanced are disregarded. When the output QA of the 1/2 frequency divider 13 rises to a ''1'', a gate 4' generates the output of AND between a count pulse P2 and the output V2 of a comparator 3. The output QA of the 1/2 frequency divider 13 is inverted in synchronizing with the 10th fall of the pulse P1 and the system stops operating. A counting circuit 16 counts the output V3 of the gate 4'. An arithmetic circuit 17 receives the output of the counting circuit 16 to perform arithmetic, and then converts the result into a digital value which corresponds to a signal Ex to be measured.
JP6579781A 1981-04-30 1981-04-30 Analog-to-digital converter Granted JPS57181227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6579781A JPS57181227A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6579781A JPS57181227A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Publications (2)

Publication Number Publication Date
JPS57181227A true JPS57181227A (en) 1982-11-08
JPS6255733B2 JPS6255733B2 (en) 1987-11-20

Family

ID=13297374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6579781A Granted JPS57181227A (en) 1981-04-30 1981-04-30 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57181227A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168239U (en) * 1983-04-25 1984-11-10 ピ−コツク魔法瓶工業株式会社 Stainless steel vacuum double container

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55646A (en) * 1978-06-16 1980-01-07 Matsushita Electric Ind Co Ltd Analog-digital converting device
JPS566528A (en) * 1979-06-28 1981-01-23 Nec Corp Signal converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55646A (en) * 1978-06-16 1980-01-07 Matsushita Electric Ind Co Ltd Analog-digital converting device
JPS566528A (en) * 1979-06-28 1981-01-23 Nec Corp Signal converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168239U (en) * 1983-04-25 1984-11-10 ピ−コツク魔法瓶工業株式会社 Stainless steel vacuum double container

Also Published As

Publication number Publication date
JPS6255733B2 (en) 1987-11-20

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