JPS57116417A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57116417A
JPS57116417A JP197881A JP197881A JPS57116417A JP S57116417 A JPS57116417 A JP S57116417A JP 197881 A JP197881 A JP 197881A JP 197881 A JP197881 A JP 197881A JP S57116417 A JPS57116417 A JP S57116417A
Authority
JP
Japan
Prior art keywords
voltage
vth
signal
turns
supplied
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
JP197881A
Other languages
Japanese (ja)
Inventor
Munehiro Minami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP197881A priority Critical patent/JPS57116417A/en
Publication of JPS57116417A publication Critical patent/JPS57116417A/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

Landscapes

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

Abstract

PURPOSE:To perform high-precision digital conversion, by obtaining a constant value of unit charging free from variation in voltage. CONSTITUTION:A reference voltage VR is supplied to an input terminal 33 and when a signal P5 which has the crest value of the same potential rises, MOS transistor TRs 34 and 35 turn on and off, respectively. Therefore, a voltage obtained by subtracting the threshold voltage VTH of the TR34 from the voltage VR is supplied to a capacitor C3, which is charged. As a result, a gate signal P2 also reaches a level VR-VTH. When the input signal P4 of this voltage VR rises, the signal P2 is to increase up to about 2VR-VTH, but an MOSTR32 turns on, so the voltage of the signal P2 drops, so that the TR32 turns off when the drops down to the VR+VTH. Therefore, the signal P2 is stablilized at the VR+ VTH. Then, a voltage at a connection point (b) is stabilized at a VR. Thus, the output of an A/D converting circuit 31, i.e., the count value of a counter circuit 18 is free from the influence variation in voltage VTH.
JP197881A 1981-01-09 1981-01-09 Analog-to-digital converter Pending JPS57116417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP197881A JPS57116417A (en) 1981-01-09 1981-01-09 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP197881A JPS57116417A (en) 1981-01-09 1981-01-09 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57116417A true JPS57116417A (en) 1982-07-20

Family

ID=11516621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP197881A Pending JPS57116417A (en) 1981-01-09 1981-01-09 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57116417A (en)

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