JPS55163914A - Digital-analog converter - Google Patents

Digital-analog converter

Info

Publication number
JPS55163914A
JPS55163914A JP7140579A JP7140579A JPS55163914A JP S55163914 A JPS55163914 A JP S55163914A JP 7140579 A JP7140579 A JP 7140579A JP 7140579 A JP7140579 A JP 7140579A JP S55163914 A JPS55163914 A JP S55163914A
Authority
JP
Japan
Prior art keywords
resistors
groups
digital
twenty
resistance
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
JP7140579A
Other languages
Japanese (ja)
Inventor
Kiyuuichi Haruyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7140579A priority Critical patent/JPS55163914A/en
Publication of JPS55163914A publication Critical patent/JPS55163914A/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
    • H03M1/78—Simultaneous conversion using ladder network
    • H03M1/785—Simultaneous conversion using ladder network using resistors, i.e. R-2R ladders

Landscapes

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

Abstract

PURPOSE:To reduce the cost of monolithic manufacture by obtaining a resistance network of high precision by the process of monolithic manufacture by forming the 1st-n-th groups of resistors by selectively connecting one resistance element of each row and each column together by metal wiring without fail. CONSTITUTION:Eight groups of resistors are formed of eight-row by eight-column resistance elements r11-R88; seven groups of resistors are used as R-2R radar circuits, and one group of them as a feedback resistor. Then, the basic constitution of a transfer switch as an electronic switch composed of two FETs and an inverter composed of two FETs as well is employed to obtain a digital-analog converter with two-bit input. For eight-bit input, twenty five groups of resistors as R-2R resistors and one group of feedback resistance are combined in a twenty-six row by twenty-six column matrix of resistance elements. Consequently, the manufacture cost can be reduced without deteriorating the digital-analog converting function and characteristics.
JP7140579A 1979-06-07 1979-06-07 Digital-analog converter Pending JPS55163914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7140579A JPS55163914A (en) 1979-06-07 1979-06-07 Digital-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7140579A JPS55163914A (en) 1979-06-07 1979-06-07 Digital-analog converter

Publications (1)

Publication Number Publication Date
JPS55163914A true JPS55163914A (en) 1980-12-20

Family

ID=13459565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7140579A Pending JPS55163914A (en) 1979-06-07 1979-06-07 Digital-analog converter

Country Status (1)

Country Link
JP (1) JPS55163914A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964919A (en) * 1982-09-02 1984-04-13 アナログ・デバイセス・インコ−ポレ−テツド Low leakage c-mos type d/a converter
JPS59138121A (en) * 1983-01-24 1984-08-08 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for matching field effect transistor switch
JPS61219220A (en) * 1985-03-25 1986-09-29 Nippon Gakki Seizo Kk D/a converter
EP0932256A1 (en) * 1997-07-03 1999-07-28 Seiko Epson Corporation Ladder type resistance circuit, and digital-analog converter and semiconductor device using the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964919A (en) * 1982-09-02 1984-04-13 アナログ・デバイセス・インコ−ポレ−テツド Low leakage c-mos type d/a converter
JPS59138121A (en) * 1983-01-24 1984-08-08 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for matching field effect transistor switch
JPH0652874B2 (en) * 1983-01-24 1994-07-06 アールシーエー トムソン ライセンシング コーポレイシヨン Device for controlling the relative conductivity of field effect transistor switches
JPS61219220A (en) * 1985-03-25 1986-09-29 Nippon Gakki Seizo Kk D/a converter
EP0932256A1 (en) * 1997-07-03 1999-07-28 Seiko Epson Corporation Ladder type resistance circuit, and digital-analog converter and semiconductor device using the same
EP0932256A4 (en) * 1997-07-03 2000-08-02 Seiko Epson Corp Ladder type resistance circuit, and digital-analog converter and semiconductor device using the same
US6208281B1 (en) 1997-07-03 2001-03-27 Seiko Epson Corporation Resistance ladder together with digital-analog converter and semiconductor using the same

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