GB2005503A - Current mode switch - Google Patents

Current mode switch

Info

Publication number
GB2005503A
GB2005503A GB7829389A GB7829389A GB2005503A GB 2005503 A GB2005503 A GB 2005503A GB 7829389 A GB7829389 A GB 7829389A GB 7829389 A GB7829389 A GB 7829389A GB 2005503 A GB2005503 A GB 2005503A
Authority
GB
United Kingdom
Prior art keywords
pair
npn transistors
coupled
reference voltage
mode switch
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.)
Withdrawn
Application number
GB7829389A
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.)
Fairchild Semiconductor Corp
Original Assignee
Fairchild Camera and Instrument Corp
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 Fairchild Camera and Instrument Corp filed Critical Fairchild Camera and Instrument Corp
Publication of GB2005503A publication Critical patent/GB2005503A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/603—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors with coupled emitters
    • 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

Abstract

A current mode switch for incorporation in a digital-to-analog converter includes a logic signal input means, a reference voltage source, a constant current source, a first pair of NPN transistors whose emitters are coupled together and to said constant current source and whose bases are coupled to said signal input means, a second pair of NPN transistors whose emitters are coupled together and whose bases are connected, respectively, to the collectors of said first pair of NPN transistors, a pair of matched resistors coupled, respectively, between one polarity of said reference voltage source and the bases of said second pair of NPN transistors, and a current source resistor coupled between said emitters of said second pair of NPN transistors and the opposite polarity of said reference voltage source. <IMAGE>
GB7829389A 1977-10-03 1978-07-11 Current mode switch Withdrawn GB2005503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83851577A 1977-10-03 1977-10-03

Publications (1)

Publication Number Publication Date
GB2005503A true GB2005503A (en) 1979-04-19

Family

ID=25277288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7829389A Withdrawn GB2005503A (en) 1977-10-03 1978-07-11 Current mode switch

Country Status (3)

Country Link
JP (1) JPS5455158A (en)
DE (1) DE2842144A1 (en)
GB (1) GB2005503A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084847A2 (en) * 1982-01-21 1983-08-03 Hewlett-Packard Company A bit cell for providing a weighted current
EP0222999A2 (en) * 1985-11-20 1987-05-27 Hewlett-Packard Company Digital-to-Analog converter with output sampler

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193980A (en) * 1981-05-25 1982-11-29 Fuji Electric Co Ltd Phase control circuit for multiple connection type inverter
JPS58114623A (en) * 1981-12-24 1983-07-08 レイセオン　カンパニ− Digital-to-analog converter circuit
JPS60153034U (en) * 1984-03-22 1985-10-12 横河電機株式会社 D/A converter
GB2229056A (en) * 1989-03-10 1990-09-12 Philips Electronic Associated Differential amplifiers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084847A2 (en) * 1982-01-21 1983-08-03 Hewlett-Packard Company A bit cell for providing a weighted current
EP0084847A3 (en) * 1982-01-21 1986-07-09 Hewlett-Packard Company A bit cell for providing a weighted current
EP0222999A2 (en) * 1985-11-20 1987-05-27 Hewlett-Packard Company Digital-to-Analog converter with output sampler
EP0222999A3 (en) * 1985-11-20 1989-12-13 Hewlett-Packard Company Digital-to-analog converter with output sampler

Also Published As

Publication number Publication date
JPS5455158A (en) 1979-05-02
DE2842144A1 (en) 1979-04-12

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)