JPS5755614A - Analog to digital converter - Google Patents

Analog to digital converter

Info

Publication number
JPS5755614A
JPS5755614A JP55130605A JP13060580A JPS5755614A JP S5755614 A JPS5755614 A JP S5755614A JP 55130605 A JP55130605 A JP 55130605A JP 13060580 A JP13060580 A JP 13060580A JP S5755614 A JPS5755614 A JP S5755614A
Authority
JP
Japan
Prior art keywords
switches
bit
logic
signal
switch
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
JP55130605A
Other languages
Japanese (ja)
Inventor
Shosaku Tsukagoshi
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 JP55130605A priority Critical patent/JPS5755614A/en
Priority to US06/293,264 priority patent/US4517549A/en
Publication of JPS5755614A publication Critical patent/JPS5755614A/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
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/40—Analogue value compared with reference values sequentially only, e.g. successive approximation type recirculation type
    • 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

Landscapes

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

Abstract

PURPOSE:To realize a 10-bit sequential comparison type analog-digital converter (ADC) by using 128 unit capacitors, by adding a resistance voltage divider, a switch array and a decoding circuit to the ADC having a sampling and a holding function. CONSTITUTION:As a synchronizing signal is applied to a terminal 124, switches 101-202 are as shown in the figure and when an analog signal is applied to a terminal 121, capacitors 103-110 are charged up to prescribed potentials. Then, the 1st operation timing signal 126 changes over the switches 101 and 120 and a line L1 is disconnected from the middle-point tap of a resistance voltage divider 201. In this state, sequential comparing operation is started and a successive operation cycle timing signal 126 places the switches at the reference voltage 122 sides one after another to determine the logic ''1'' of the MSB of a switch control code 204. After the output logic is determined from the MSB to the 7th bit, the 8th bit of the output code signal of a sequential comparison register 127 is set to logic ''1'' and a switch (d) in a switch array 202 is turned on to perform the comparing operation again.
JP55130605A 1980-08-25 1980-09-22 Analog to digital converter Pending JPS5755614A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55130605A JPS5755614A (en) 1980-09-22 1980-09-22 Analog to digital converter
US06/293,264 US4517549A (en) 1980-08-25 1981-08-17 Weighted capacitor analogue-digital converters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55130605A JPS5755614A (en) 1980-09-22 1980-09-22 Analog to digital converter

Publications (1)

Publication Number Publication Date
JPS5755614A true JPS5755614A (en) 1982-04-02

Family

ID=15038201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55130605A Pending JPS5755614A (en) 1980-08-25 1980-09-22 Analog to digital converter

Country Status (1)

Country Link
JP (1) JPS5755614A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755841A (en) * 1988-01-06 1988-07-05 Eastman Kodak Company Method of initializing a frame counter
US4814805A (en) * 1988-02-04 1989-03-21 Eastman Kodak Company Film exposure counter
JPH0344215A (en) * 1989-07-12 1991-02-26 Sanyo Electric Co Ltd A/d converter
US6714151B2 (en) 2002-06-21 2004-03-30 Fujitsu Limited A/D converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200863A (en) * 1977-10-03 1980-04-29 The Regents Of The University Of California Weighted capacitor analog/digital converting apparatus and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200863A (en) * 1977-10-03 1980-04-29 The Regents Of The University Of California Weighted capacitor analog/digital converting apparatus and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755841A (en) * 1988-01-06 1988-07-05 Eastman Kodak Company Method of initializing a frame counter
US4814805A (en) * 1988-02-04 1989-03-21 Eastman Kodak Company Film exposure counter
JPH0344215A (en) * 1989-07-12 1991-02-26 Sanyo Electric Co Ltd A/d converter
US6714151B2 (en) 2002-06-21 2004-03-30 Fujitsu Limited A/D converter

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