JPS5675727A - A-d converter - Google Patents

A-d converter

Info

Publication number
JPS5675727A
JPS5675727A JP15232779A JP15232779A JPS5675727A JP S5675727 A JPS5675727 A JP S5675727A JP 15232779 A JP15232779 A JP 15232779A JP 15232779 A JP15232779 A JP 15232779A JP S5675727 A JPS5675727 A JP S5675727A
Authority
JP
Japan
Prior art keywords
digital
signal
output
converter
comparator
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
JP15232779A
Other languages
Japanese (ja)
Inventor
Ichiro Yamashita
Kazufumi Yamaguchi
Atsushi Nakagawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15232779A priority Critical patent/JPS5675727A/en
Publication of JPS5675727A publication Critical patent/JPS5675727A/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
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter

Landscapes

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

Abstract

PURPOSE:To increase the conversion speed by digital compensation so that the error in digital signal is minimized, by converting an input analog signal into a digital signal with a coarse accuracy in high speed. CONSTITUTION:When a start command 5 is received and the 1st clock 24 starts operation, a counter 21 is in the state possible for preset. To an input analog signal 6, a D-A converter 1, comparator 2 and sequential, approximate control logic 23 execute the A-D conversion in M bits by means of sequential approximation to obtain digital outputs b1, b2,...bM. If the signal 6 is smaller than the output of the D-A converter 1, the 2nd clock 25 is counted down, and if the analog input is greater inversely, count-up is made. The count is continued until the output of the comparator 2 first changes and ends at the changed time point. In this case, the counter outputs (d1, d2,...dN) are the final digital output.
JP15232779A 1979-11-24 1979-11-24 A-d converter Pending JPS5675727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15232779A JPS5675727A (en) 1979-11-24 1979-11-24 A-d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15232779A JPS5675727A (en) 1979-11-24 1979-11-24 A-d converter

Publications (1)

Publication Number Publication Date
JPS5675727A true JPS5675727A (en) 1981-06-23

Family

ID=15538097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15232779A Pending JPS5675727A (en) 1979-11-24 1979-11-24 A-d converter

Country Status (1)

Country Link
JP (1) JPS5675727A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60105971A (en) * 1983-11-15 1985-06-11 Iwatsu Electric Co Ltd Analog signal measuring apparatus
JPS60126922A (en) * 1983-12-13 1985-07-06 Matsushita Electric Ind Co Ltd A/d converting device
JPS60148228A (en) * 1984-01-12 1985-08-05 Mitsubishi Electric Corp Analog-digital converter
JPS60248024A (en) * 1984-02-09 1985-12-07 インタ−シル，インコ−ポレ−テツド High speed high accuracy analog-to-digital converter
JPS62169511A (en) * 1986-01-22 1987-07-25 Pioneer Electronic Corp Digital delay circuit
JPH01133422A (en) * 1987-07-22 1989-05-25 Samsung Semiconductor & Teleommun Co Ltd Totally parallel and successively comparing analog-digital converter
JPH01162420A (en) * 1987-12-19 1989-06-26 Nippon Hoso Kyokai <Nhk> Sub-range type a/d converter
JPH11274928A (en) * 1999-02-15 1999-10-08 Seiko Instruments Inc Analog-to-digital converter circuit device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60105971A (en) * 1983-11-15 1985-06-11 Iwatsu Electric Co Ltd Analog signal measuring apparatus
JPS60126922A (en) * 1983-12-13 1985-07-06 Matsushita Electric Ind Co Ltd A/d converting device
JPS60148228A (en) * 1984-01-12 1985-08-05 Mitsubishi Electric Corp Analog-digital converter
JPS60248024A (en) * 1984-02-09 1985-12-07 インタ−シル，インコ−ポレ−テツド High speed high accuracy analog-to-digital converter
JPH0712149B2 (en) * 1984-02-09 1995-02-08 インタ−シル，インコ−ポレ−テツド High speed and high precision analog digital converter
JPS62169511A (en) * 1986-01-22 1987-07-25 Pioneer Electronic Corp Digital delay circuit
JPH01133422A (en) * 1987-07-22 1989-05-25 Samsung Semiconductor & Teleommun Co Ltd Totally parallel and successively comparing analog-digital converter
JPH01162420A (en) * 1987-12-19 1989-06-26 Nippon Hoso Kyokai <Nhk> Sub-range type a/d converter
JPH0377691B2 (en) * 1987-12-19 1991-12-11 Japan Broadcasting Corp
JPH11274928A (en) * 1999-02-15 1999-10-08 Seiko Instruments Inc Analog-to-digital converter circuit device

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