JPS55141822A - Digital-analog converter - Google Patents

Digital-analog converter

Info

Publication number
JPS55141822A
JPS55141822A JP5115679A JP5115679A JPS55141822A JP S55141822 A JPS55141822 A JP S55141822A JP 5115679 A JP5115679 A JP 5115679A JP 5115679 A JP5115679 A JP 5115679A JP S55141822 A JPS55141822 A JP S55141822A
Authority
JP
Japan
Prior art keywords
current
difference
current generating
transistors
binary weight
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
JP5115679A
Other languages
Japanese (ja)
Inventor
Kazufumi Yamaguchi
Ichiro Yamashita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5115679A priority Critical patent/JPS55141822A/en
Publication of JPS55141822A publication Critical patent/JPS55141822A/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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters

Landscapes

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

Abstract

PURPOSE:To eliminate the factor of error due to mismatching of VBE, by flowing the current having the amplitude to cancell the difference of VBE of the constant current generating transistor due to the difference of the bit current from one end of the R/2R ladder resistor network. CONSTITUTION:The transistors 241, 242 of the correction current generating circuit 24 have the emitter area ratio of 2:1, then the potential difference of DELTAVBE is produced between the emitters. The collector current difference DELTAI of the both transistors by this potential difference is produced on the correction current injection line 25 with the current Miller circuit 243, and when DELTAI is injected to the LSB side end 222 of the ladder resistance network 22, a voltage having the amplitude to cancell DELTAVBE of the constant current generating transistor of the binary weight current generating circuit is added across each lateral resistor R, and binary weight voltage is fed to the longitudinal resistor 2R of the ladder resistor network, allowing to obtain accurate binary weight current even with the same emitter area of the constant current generating transistors.
JP5115679A 1979-04-24 1979-04-24 Digital-analog converter Pending JPS55141822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5115679A JPS55141822A (en) 1979-04-24 1979-04-24 Digital-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5115679A JPS55141822A (en) 1979-04-24 1979-04-24 Digital-analog converter

Publications (1)

Publication Number Publication Date
JPS55141822A true JPS55141822A (en) 1980-11-06

Family

ID=12878959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5115679A Pending JPS55141822A (en) 1979-04-24 1979-04-24 Digital-analog converter

Country Status (1)

Country Link
JP (1) JPS55141822A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148516A (en) * 1982-02-23 1983-09-03 バア−−ブラウン・リサ−チ・コ−ポレ−シヨン Adjustable resistance magnifying circuit adapted for digital-to-analog converter
JPS61145615A (en) * 1984-12-19 1986-07-03 Nec Ic Microcomput Syst Ltd Constant voltage power supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148516A (en) * 1982-02-23 1983-09-03 バア−−ブラウン・リサ−チ・コ−ポレ−シヨン Adjustable resistance magnifying circuit adapted for digital-to-analog converter
JPH041529B2 (en) * 1982-02-23 1992-01-13 Burr Brown Corp
JPS61145615A (en) * 1984-12-19 1986-07-03 Nec Ic Microcomput Syst Ltd Constant voltage power supply

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