JPS56168427A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS56168427A
JPS56168427A JP7179880A JP7179880A JPS56168427A JP S56168427 A JPS56168427 A JP S56168427A JP 7179880 A JP7179880 A JP 7179880A JP 7179880 A JP7179880 A JP 7179880A JP S56168427 A JPS56168427 A JP S56168427A
Authority
JP
Japan
Prior art keywords
converter
voltage
amplifier
terminal
converted
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
JP7179880A
Other languages
Japanese (ja)
Inventor
Akinori Bando
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7179880A priority Critical patent/JPS56168427A/en
Publication of JPS56168427A publication Critical patent/JPS56168427A/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
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Landscapes

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

Abstract

PURPOSE:To realize a compact A/D converter, by installing a variable gain amplifier, a logical circuit and an A/D converter within an integrated circuit. CONSTITUTION:An A/D converting unit 1 is formed within a single chip in the form of an integrated circuit. Then a signal designating a range of voltage is applied to a terminal 8 to be decided by a logical circuit 7. Then a switch 5-1 is turned on to connect a resistance R1 to an operational amplifier 4 and to set the gain of a variable gain amplifier 3 to a prescribed value. Then the voltage is applied to an input terminal 6 to be amplified by the amplifier 3. This amplified voltage is converted into a signal equivalent to the rated level of an A/D converter 2 and then converted into a digital signal by the converter 2 to be delivered through a terminal 9.
JP7179880A 1980-05-28 1980-05-28 Analog-to-digital converter Pending JPS56168427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7179880A JPS56168427A (en) 1980-05-28 1980-05-28 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7179880A JPS56168427A (en) 1980-05-28 1980-05-28 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS56168427A true JPS56168427A (en) 1981-12-24

Family

ID=13470932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7179880A Pending JPS56168427A (en) 1980-05-28 1980-05-28 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS56168427A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142823A (en) * 1984-12-17 1986-06-30 Tokyo Keiki Co Ltd Signal converting system
JPS62178630U (en) * 1986-05-06 1987-11-13
JP2006050311A (en) * 2004-08-05 2006-02-16 Canon Inc Analog signal output device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142823A (en) * 1984-12-17 1986-06-30 Tokyo Keiki Co Ltd Signal converting system
JPS62178630U (en) * 1986-05-06 1987-11-13
JP2006050311A (en) * 2004-08-05 2006-02-16 Canon Inc Analog signal output device
JP4585810B2 (en) * 2004-08-05 2010-11-24 キヤノン株式会社 Signal processing apparatus and signal processing system

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