GB1188719A - Digital-to-Analogue Converter - Google Patents

Digital-to-Analogue Converter

Info

Publication number
GB1188719A
GB1188719A GB4452567A GB4452567A GB1188719A GB 1188719 A GB1188719 A GB 1188719A GB 4452567 A GB4452567 A GB 4452567A GB 4452567 A GB4452567 A GB 4452567A GB 1188719 A GB1188719 A GB 1188719A
Authority
GB
United Kingdom
Prior art keywords
load
digital
signal
comparator
analog
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.)
Expired
Application number
GB4452567A
Inventor
George Richard Hoffman
Stephen Frederick Gourley
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB4452567A priority Critical patent/GB1188719A/en
Publication of GB1188719A publication Critical patent/GB1188719A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/04—Deflection circuits ; Constructional details not otherwise provided for
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is dc characterised by reference voltage circuitry, e.g. soft start, remote shutdown
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H03K6/02—Amplifying pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Automation & Control Theory (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1,188,719. Digital/analog converters. NATIONAL RESEARCH DEVELOPMENT CORP. 21 Oct., 1968 [29 Sept., 1967], No. 44525/67. Heading G4H. Apparatus for applying an anlog signal dependent on a digital input signal to a load 11 includes a digital/analog converter 12 supplying an analog signal to the load and a comparator 16 comparing the output signal from the load with a further signal dependent on the digital input, the error signal from the comparator 16 being fed to the load. In the embodiment described the converter 12 supplies a current to the load via a transistor 13 and a further digital/analog converter 14 supplies a current of opposite polarity via transistor 15. The voltage across resistor R F in series with the load is compared in comparator 16 with the output of a digital/analog voltage comparator an error signal being fed to the load via amplifier 18 and transistor 15 when they differ. The load may be the scan coil of an electron beam machine for forming patterns on a substrate.
GB4452567A 1967-09-29 1967-09-29 Digital-to-Analogue Converter Expired GB1188719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4452567A GB1188719A (en) 1967-09-29 1967-09-29 Digital-to-Analogue Converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4452567A GB1188719A (en) 1967-09-29 1967-09-29 Digital-to-Analogue Converter

Publications (1)

Publication Number Publication Date
GB1188719A true GB1188719A (en) 1970-04-22

Family

ID=10433707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4452567A Expired GB1188719A (en) 1967-09-29 1967-09-29 Digital-to-Analogue Converter

Country Status (1)

Country Link
GB (1) GB1188719A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2287722A1 (en) * 1974-10-09 1976-05-07 United Technologies Corp POWER SUPPLY CIRCUIT ENERGY CONSERVATIVE MODULE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2287722A1 (en) * 1974-10-09 1976-05-07 United Technologies Corp POWER SUPPLY CIRCUIT ENERGY CONSERVATIVE MODULE

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees