JPS5758415A - Conversion circuit - Google Patents

Conversion circuit

Info

Publication number
JPS5758415A
JPS5758415A JP13293080A JP13293080A JPS5758415A JP S5758415 A JPS5758415 A JP S5758415A JP 13293080 A JP13293080 A JP 13293080A JP 13293080 A JP13293080 A JP 13293080A JP S5758415 A JPS5758415 A JP S5758415A
Authority
JP
Japan
Prior art keywords
chips
voltage source
chip
emitter
base
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
JP13293080A
Other languages
Japanese (ja)
Inventor
Tsutomu Noda
Isao Akitake
Shinichi Ohashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13293080A priority Critical patent/JPS5758415A/en
Publication of JPS5758415A publication Critical patent/JPS5758415A/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 reduce the change in output current against temperature change, by incorporating a reference voltage source to a speciric IC chip at a current switching section and supplying it to other IC chips, in a D/A converter constituted through a plurality of IC chips. CONSTITUTION:An output 39 of a referemce voltage source 38 in an IC chip of four bits' share has the temperature characteristics of a voltage between the base and emitter of transistors (TR)24-27 and it is applied to the base of the TRs 24-27 via a bias input terminal 13. Thus, the emitter voltage is not subjected to temperature change and also the current in resistors 28-31. In constituting four IC chips 41-44 for 16-bit, the output of the reference voltage source 38 of the IC chip 41 in 4- bit including the most significant bit is applied as the reference voltage source of the other IC chips 42-44. Thus, the dispersion in the voltage between the base and emitter of each TR between the IC chips correspondings to 1% of a voltage applied to a ladder resistor 5 and the width of resistance value adjustment can be 1%.
JP13293080A 1980-09-26 1980-09-26 Conversion circuit Pending JPS5758415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13293080A JPS5758415A (en) 1980-09-26 1980-09-26 Conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13293080A JPS5758415A (en) 1980-09-26 1980-09-26 Conversion circuit

Publications (1)

Publication Number Publication Date
JPS5758415A true JPS5758415A (en) 1982-04-08

Family

ID=15092817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13293080A Pending JPS5758415A (en) 1980-09-26 1980-09-26 Conversion circuit

Country Status (1)

Country Link
JP (1) JPS5758415A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02159825A (en) * 1988-12-13 1990-06-20 Nec Corp A/d converter
US5107757A (en) * 1985-12-30 1992-04-28 Ebara Corporation Apparatus for dewatering waste material by capillary action

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430926U (en) * 1977-08-03 1979-02-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430926U (en) * 1977-08-03 1979-02-28

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107757A (en) * 1985-12-30 1992-04-28 Ebara Corporation Apparatus for dewatering waste material by capillary action
JPH02159825A (en) * 1988-12-13 1990-06-20 Nec Corp A/d converter

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