JPS57178419A - D/a converting circuit - Google Patents

D/a converting circuit

Info

Publication number
JPS57178419A
JPS57178419A JP6300381A JP6300381A JPS57178419A JP S57178419 A JPS57178419 A JP S57178419A JP 6300381 A JP6300381 A JP 6300381A JP 6300381 A JP6300381 A JP 6300381A JP S57178419 A JPS57178419 A JP S57178419A
Authority
JP
Japan
Prior art keywords
current
collector
trq5
vin4
reference voltage
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.)
Granted
Application number
JP6300381A
Other languages
Japanese (ja)
Other versions
JPH0214815B2 (en
Inventor
Katsumi Nagano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6300381A priority Critical patent/JPS57178419A/en
Publication of JPS57178419A publication Critical patent/JPS57178419A/en
Publication of JPH0214815B2 publication Critical patent/JPH0214815B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To realize compact structure and the reduction of cost by decreasing the number of elements greatly by leading an output current out of the collector of a multiemitter transistor (TR) which has an N-number of emitters where an N-number of current sources having weighted values are connected. CONSTITUTION:Current sources I1-I4 has current values which correspond to the weights of bits inputted to terminals Vin1-Vin4. For example, a voltage applied to the Vin2 is higher than a reference voltage applied to a terminal Vref, a current from the current source I2 flows to a TRQ2 and never appears at the collector of a TRQ5. When it is lower than the reference voltage to the contrary, a current from the current source I1 appears at the collector of the TRQ5. Similarly, currents from the current sources I1-I4 appear at the collector of the multiemitter TRQ5 through its emitters corresponding to voltages applied to the terminals Vin1-Vin4.
JP6300381A 1981-04-25 1981-04-25 D/a converting circuit Granted JPS57178419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6300381A JPS57178419A (en) 1981-04-25 1981-04-25 D/a converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6300381A JPS57178419A (en) 1981-04-25 1981-04-25 D/a converting circuit

Publications (2)

Publication Number Publication Date
JPS57178419A true JPS57178419A (en) 1982-11-02
JPH0214815B2 JPH0214815B2 (en) 1990-04-10

Family

ID=13216704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6300381A Granted JPS57178419A (en) 1981-04-25 1981-04-25 D/a converting circuit

Country Status (1)

Country Link
JP (1) JPS57178419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099718A2 (en) * 1982-07-13 1984-02-01 Hitachi, Ltd. An intermediate value selection circuit
US6072413A (en) * 1996-11-28 2000-06-06 Nec Corporation Current output type digital-to-analog converter capable of suppressing output current fluctuation using a current mirror

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099718A2 (en) * 1982-07-13 1984-02-01 Hitachi, Ltd. An intermediate value selection circuit
US6072413A (en) * 1996-11-28 2000-06-06 Nec Corporation Current output type digital-to-analog converter capable of suppressing output current fluctuation using a current mirror

Also Published As

Publication number Publication date
JPH0214815B2 (en) 1990-04-10

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