JPS57109424A - Analogue-digital converter - Google Patents

Analogue-digital converter

Info

Publication number
JPS57109424A
JPS57109424A JP18405480A JP18405480A JPS57109424A JP S57109424 A JPS57109424 A JP S57109424A JP 18405480 A JP18405480 A JP 18405480A JP 18405480 A JP18405480 A JP 18405480A JP S57109424 A JPS57109424 A JP S57109424A
Authority
JP
Japan
Prior art keywords
voltage
terminals
switches
switch
movable
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.)
Granted
Application number
JP18405480A
Other languages
Japanese (ja)
Other versions
JPS636169B2 (en
Inventor
Masayuki Matsuyoshi
Masao Takeuchi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP18405480A priority Critical patent/JPS57109424A/en
Publication of JPS57109424A publication Critical patent/JPS57109424A/en
Publication of JPS636169B2 publication Critical patent/JPS636169B2/ja
Granted 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
    • H03M1/466—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors
    • H03M1/468—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors in which the input S/H circuit is merged with the feedback DAC array

Landscapes

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

Abstract

PURPOSE:To give a number of degrees of freedom to the quantization error distribution for an analogue input voltage, by moving the transfer function for the analogue input voltage in parallel. CONSTITUTION:An analogue switch SW13 is closed, and movable terminals (a) of switches SW11 and SW15 are connected to fixed terminals (c) respectively, and movable terminals (a) of switches SW01-SW04, SW12, SW14, SW16, and SW17 are connected to fixed terminals (b). Then, a voltage VP at a point P is equal to 1/2VR1. Next, movable terminals (a) of switches SW14 and SW17 are moved to fixed terminals (c). Under this state, the movable terminal (a) of the switch SW12 is connected to the terminal (c). Then, the voltage VP is equal to 1/2VR1+1/2LSB, and this voltage is held in a capacitor C' through a voltage comparator 14. Next, the switch SW13 is opened, and switches SW01-SW04, SW11, SW12, and SW14-SW17 are connected to terminals (b), and the switch SW13 is closed, thus taking in an analogue input. The switch SW13 is opened, and movable terminals of switches SW11, SW16, and SW17 are connected to terminals (c). Then, a voltage VQ at a point Q is changed to 1/2VR1+1/2LSB and becomes a reference voltage of the voltage comparator hereafter.
JP18405480A 1980-12-26 1980-12-26 Analogue-digital converter Granted JPS57109424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18405480A JPS57109424A (en) 1980-12-26 1980-12-26 Analogue-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18405480A JPS57109424A (en) 1980-12-26 1980-12-26 Analogue-digital converter

Publications (2)

Publication Number Publication Date
JPS57109424A true JPS57109424A (en) 1982-07-07
JPS636169B2 JPS636169B2 (en) 1988-02-08

Family

ID=16146562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18405480A Granted JPS57109424A (en) 1980-12-26 1980-12-26 Analogue-digital converter

Country Status (1)

Country Link
JP (1) JPS57109424A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142421A (en) * 1985-12-17 1987-06-25 Oki Electric Ind Co Ltd A/d conversion method and a/d convertor used for it
JPS6416027A (en) * 1987-07-09 1989-01-19 Oki Electric Ind Co Ltd A/d converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142421A (en) * 1985-12-17 1987-06-25 Oki Electric Ind Co Ltd A/d conversion method and a/d convertor used for it
JPH0523650B2 (en) * 1985-12-17 1993-04-05 Oki Electric Ind Co Ltd
JPS6416027A (en) * 1987-07-09 1989-01-19 Oki Electric Ind Co Ltd A/d converter

Also Published As

Publication number Publication date
JPS636169B2 (en) 1988-02-08

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