GB819295A - An electrical digital to analog translator - Google Patents

An electrical digital to analog translator

Info

Publication number
GB819295A
GB819295A GB17839/57A GB1783957A GB819295A GB 819295 A GB819295 A GB 819295A GB 17839/57 A GB17839/57 A GB 17839/57A GB 1783957 A GB1783957 A GB 1783957A GB 819295 A GB819295 A GB 819295A
Authority
GB
United Kingdom
Prior art keywords
voltage
input
digital
series
registered
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
GB17839/57A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB819295A publication Critical patent/GB819295A/en
Expired 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
    • H03M1/12—Analogue/digital converters
    • H03M1/64—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals
    • H03M1/645—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals for position encoding, e.g. using resolvers or synchros

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

819,295. Electric selective signalling systems. STANDARD TELEPHONES & CABLES Ltd. June 5, 1957 [June 5, 1956], No. 17839/57. Class 40 (1). Apparatus for translating a digital code signal group to an analogue signal comprises input terminals for connection to a single-phase A.C. voltage source, output terminals for connection to a voltage-responsive indicating device, a plurality of normally short-circuited singlephase A.C. voltage varying devices arranged in series between said input and output terminals, each said voltage-varying device corresponding to a digital position of a code group to be translated, and switching means for each of said voltage-varying devices responsive to a one (or zero) digital code signal in the corresponding digital position of the code group to series connect the corresponding one of said voltagevarying devices between said input and output terminals, whereby the total variation to which the voltage from said source is subjected in its passage from said input to said output corresponds to the digital code signal group being translated to an analogue representation which is indicated by said voltage-responsive indicating device. In a first embodiment, Fig. 1, data is registered in digital form on five relays 7 to 11, to cause selected phase-shifting circuits to be switched into series thereby causing a voltage at terminals 12 which differs in phase from an input voltage E 1N by an amount representative of the data registered digitally on the relays. This phase difference causes a servomotor 13 to correspondingly position a shaft. In a second embodiment, Fig. 2, synchro differential transformers are selectively switched into series by relays 21 to 24 in such a way that the resultant field produced by the stator 25 of a so-called synchro-motor is displaced angularly with respect to an input field caused by a voltage applied to a primary winding 15 of a transformer 27 by an amount representative of the registered data. Rotor 26 of the synchro-motor therefore moves through an angle representative of the registered data.
GB17839/57A 1956-06-05 1957-06-05 An electrical digital to analog translator Expired GB819295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US589536A US2881419A (en) 1956-06-05 1956-06-05 Digital to analog translator

Publications (1)

Publication Number Publication Date
GB819295A true GB819295A (en) 1959-09-02

Family

ID=24358414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17839/57A Expired GB819295A (en) 1956-06-05 1957-06-05 An electrical digital to analog translator

Country Status (5)

Country Link
US (1) US2881419A (en)
BE (1) BE558095A (en)
CH (1) CH359748A (en)
GB (1) GB819295A (en)
NL (1) NL217829A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221323A (en) * 1959-10-26 1965-11-30 Raytheon Co Digital converter
US3100299A (en) * 1961-06-19 1963-08-06 Theodore W Congdon Analog to digital code converter
US3234374A (en) * 1962-08-22 1966-02-08 Babcock & Wilcox Co Apparatus for use in difference computation
US3456253A (en) * 1964-03-04 1969-07-15 Shimon Abramovich Vainer Binary code-to-sine voltage phase converter
US3353095A (en) * 1964-06-25 1967-11-14 Inductosyn Corp Variable speed position measuring transformer system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1448402A (en) * 1916-06-05 1923-03-13 Westinghouse Electric & Mfg Co Measuring system
US1786780A (en) * 1925-12-17 1930-12-30 Judson O Shepherd Supervisory and control system
US2023221A (en) * 1928-07-25 1935-12-03 Siemens Ag Transmitting measurements to a remote point
US2062110A (en) * 1930-06-06 1936-11-24 Amy R Swartwout Transformer measuring instrument
US2473578A (en) * 1945-04-03 1949-06-21 Liquidometer Corp Totalizer
US2630481A (en) * 1948-07-21 1953-03-03 Eric A Johnson Data transmission system
US2738504A (en) * 1951-08-18 1956-03-13 Gen Precision Lab Inc Digital number converter
US2808547A (en) * 1955-08-19 1957-10-01 Adler Samuel Synchro generating means

Also Published As

Publication number Publication date
NL217829A (en) 1900-01-01
CH359748A (en) 1962-01-31
BE558095A (en) 1900-01-01
US2881419A (en) 1959-04-07

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