JPS57115026A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57115026A
JPS57115026A JP73081A JP73081A JPS57115026A JP S57115026 A JPS57115026 A JP S57115026A JP 73081 A JP73081 A JP 73081A JP 73081 A JP73081 A JP 73081A JP S57115026 A JPS57115026 A JP S57115026A
Authority
JP
Japan
Prior art keywords
inputted
output
terminal
converter
input signal
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
JP73081A
Other languages
Japanese (ja)
Inventor
Kenichi Torii
Toshiyasu Yoshizawa
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 JP73081A priority Critical patent/JPS57115026A/en
Publication of JPS57115026A publication Critical patent/JPS57115026A/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
    • H03M1/20—Increasing resolution using an n bit system to obtain n + m bits
    • 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
    • H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
    • H03M1/145—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit the steps being performed sequentially in series-connected stages
    • H03M1/146—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit the steps being performed sequentially in series-connected stages all stages being simultaneous converters

Landscapes

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

Abstract

PURPOSE:To increase the bit accuracy, even if the number of bits is increased by one bit, by superimposing a level half the minimum quantizing level on an output of a D/A converter and selecting a greater signal out of a difference signal with an input signal. CONSTITUTION:When an input signal is applied to a terminal 1, voltage comparison is made at a comparator group 2 with a latch, a digital output is obtained and a Q terminal output is inputted to a coding circuit 90. On the other hand, a Q' terminal output is inputted to a D/A converter 5, while the output is inputted to a - terminal of a differential voltage generating circuit 6, it is connected to a constant current source 53 and a current half the current source current I of the D/A converter 5 flows at all times. After the input signal passes through a delay circuit 3, it is inputted to a + terminal of the differential voltage generator 6, a greater voltage out of inverting and noninverting outputs is selected at a peak signal detection circuit 64 and inputted to a comparator group 7, and an output Q or Q' is selected and inputted to a coding circuit 90.
JP73081A 1981-01-08 1981-01-08 Analog-to-digital converter Pending JPS57115026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP73081A JPS57115026A (en) 1981-01-08 1981-01-08 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP73081A JPS57115026A (en) 1981-01-08 1981-01-08 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57115026A true JPS57115026A (en) 1982-07-17

Family

ID=11481844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP73081A Pending JPS57115026A (en) 1981-01-08 1981-01-08 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57115026A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59207732A (en) * 1983-05-11 1984-11-24 Yokogawa Hokushin Electric Corp Two step type ad converter
JPS60138619A (en) * 1983-12-27 1985-07-23 Shimadzu Corp Auto-zero circuit
JPS6248124A (en) * 1985-08-23 1987-03-02 バ−・ブラウン・コ−ポレ−シヨン Subranging analog-digital converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59207732A (en) * 1983-05-11 1984-11-24 Yokogawa Hokushin Electric Corp Two step type ad converter
JPH0526372B2 (en) * 1983-05-11 1993-04-15 Yokogawa Electric Corp
JPS60138619A (en) * 1983-12-27 1985-07-23 Shimadzu Corp Auto-zero circuit
JPS6248124A (en) * 1985-08-23 1987-03-02 バ−・ブラウン・コ−ポレ−シヨン Subranging analog-digital converter

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