JPS574621A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS574621A
JPS574621A JP7798780A JP7798780A JPS574621A JP S574621 A JPS574621 A JP S574621A JP 7798780 A JP7798780 A JP 7798780A JP 7798780 A JP7798780 A JP 7798780A JP S574621 A JPS574621 A JP S574621A
Authority
JP
Japan
Prior art keywords
voltage
reference voltage
generator
value
holding
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
JP7798780A
Other languages
Japanese (ja)
Inventor
Kiyuuichi Haruyama
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 JP7798780A priority Critical patent/JPS574621A/en
Publication of JPS574621A publication Critical patent/JPS574621A/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 increase the range of input converting voltage, by detecting a difference voltage between the reference voltage and the input voltage with a correction given to the reference voltage and holding the reference voltage for a prescribed period to add an automatic scale correcting function. CONSTITUTION:An input device 31 samples the voltage of a reference power source 29 and holds it after dividing it into holding capacities 35 and 36. A difference between the division value of the reference voltage and the reference value 32 of a reference signal generator 33 is detected by a comparator 32. Then the division value of the reference voltage is corrected by a correcting circuit 34, and the reference voltage value is held by a holding capacity 38. At the same time, an analog input voltage is held to a holding capacity 35. The reference signal voltage supplied from the generator 33 is compared with an analog input voltage through the comparator 32, and the result of comparison is sent back to a logic control part 10 to decide the set or reset of the reference signal sent from the generator 33. The result of comparison is also delivered in the form of a digital output 14.
JP7798780A 1980-06-10 1980-06-10 Analog-to-digital converter Pending JPS574621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7798780A JPS574621A (en) 1980-06-10 1980-06-10 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7798780A JPS574621A (en) 1980-06-10 1980-06-10 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS574621A true JPS574621A (en) 1982-01-11

Family

ID=13649194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7798780A Pending JPS574621A (en) 1980-06-10 1980-06-10 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS574621A (en)

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