JPS5787621A - Digital-to-analog converter - Google Patents

Digital-to-analog converter

Info

Publication number
JPS5787621A
JPS5787621A JP16407380A JP16407380A JPS5787621A JP S5787621 A JPS5787621 A JP S5787621A JP 16407380 A JP16407380 A JP 16407380A JP 16407380 A JP16407380 A JP 16407380A JP S5787621 A JPS5787621 A JP S5787621A
Authority
JP
Japan
Prior art keywords
fets
mosfets
input data
ratio
digital
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
JP16407380A
Other languages
Japanese (ja)
Inventor
Tatsuji Asakawa
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP16407380A priority Critical patent/JPS5787621A/en
Publication of JPS5787621A publication Critical patent/JPS5787621A/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
    • H03M1/66—Digital/analogue converters
    • H03M1/74—Simultaneous conversion
    • H03M1/80—Simultaneous conversion using weighted impedances

Landscapes

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

Abstract

PURPOSE:To make the circuit integration easy, by using an MOSFET in place of a resistor by giving weight to the ratio of channel width to channel length. CONSTITUTION:Weighting is made so that the ratio of channel width to channel length of Nth MOSFETs 11-14 is (1/2N<-1>) to that of an MOSFET10. That is, taking a current flowing to an FET10 as I0, a current of (I0/2N<-1>) flows to an FET14. Switches S1-SN are controlled with input data, currents flowing to MOSFETs 15-19 are added at an adder 25 to be an analog value according to the input data. Since constant current operation is made for the FETs 10-14 with a comparator 7, no error is caused even to some extent of output resistance of the FETs 15-19.
JP16407380A 1980-11-21 1980-11-21 Digital-to-analog converter Pending JPS5787621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16407380A JPS5787621A (en) 1980-11-21 1980-11-21 Digital-to-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16407380A JPS5787621A (en) 1980-11-21 1980-11-21 Digital-to-analog converter

Publications (1)

Publication Number Publication Date
JPS5787621A true JPS5787621A (en) 1982-06-01

Family

ID=15786259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16407380A Pending JPS5787621A (en) 1980-11-21 1980-11-21 Digital-to-analog converter

Country Status (1)

Country Link
JP (1) JPS5787621A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954322A (en) * 1982-09-22 1984-03-29 Hitachi Ltd Digital-analog converter
JPH02156728A (en) * 1988-12-08 1990-06-15 Toshiba Corp Bias circuit for a/d converter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107330A (en) * 1979-02-13 1980-08-18 Advantest Corp Digital-analog converter
JPS55135419A (en) * 1979-04-07 1980-10-22 Itt Monolithic integrated circuit for digital to analog converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107330A (en) * 1979-02-13 1980-08-18 Advantest Corp Digital-analog converter
JPS55135419A (en) * 1979-04-07 1980-10-22 Itt Monolithic integrated circuit for digital to analog converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954322A (en) * 1982-09-22 1984-03-29 Hitachi Ltd Digital-analog converter
JPH02156728A (en) * 1988-12-08 1990-06-15 Toshiba Corp Bias circuit for a/d converter

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