GB905382A - Improvements in or relating to electronic coding and decoding devices - Google Patents

Improvements in or relating to electronic coding and decoding devices

Info

Publication number
GB905382A
GB905382A GB3950/59A GB395059A GB905382A GB 905382 A GB905382 A GB 905382A GB 3950/59 A GB3950/59 A GB 3950/59A GB 395059 A GB395059 A GB 395059A GB 905382 A GB905382 A GB 905382A
Authority
GB
United Kingdom
Prior art keywords
circuits
rectifier
inputs
illustrates
output
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
GB3950/59A
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.)
Compagnie Industrielle des Telephones SA
Original Assignee
Compagnie Industrielle des Telephones SA
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 Compagnie Industrielle des Telephones SA filed Critical Compagnie Industrielle des Telephones SA
Publication of GB905382A publication Critical patent/GB905382A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/16—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G09C1/06—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member
    • G09C1/10—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member the connections being electrical
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/16—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using saturable magnetic devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry
    • H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/34—Encoding or coding, e.g. Huffman coding or error correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Software Systems (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

905,382. Circuits for non-linear magnetic cores. COMPAGNIE INDUSTRIELLE DES TELEPHONES. Feb. 4, 1959 [Feb. 4, 1958], No. 3950/59. Class 40 (9). A magnetic amplifier simulating a centrestable polarized relay comprises two cores T1, T2 having similarly poled control windings I, III connected in series and oppositely poled windings II fed with A.C. and each connected in series with a rectifier to a common point K which is connected to the input of transistor TR. Fig. 3 illustrates the current/control ampere turns characteristic for the output from rectifier Rd 1 , Fig. 4 illustrates that for rectifier Rd 2 and, Fig. 5, curve S 1 illustrates the combined characteristic. When the current exceeds a value I o =(U o -U 1 )/r emitter current flows and collector current follows with the exception that it is clamped to a value IT =(U 2 - U 1 )/R when the collector potential equals the base potential. The resulting collector current/control ampere turns characteristic is thus, as shown in Fig. 1, the equivalent of a centre stable relay. The arrangement may be used as an " exclusive-or " circuit, the two inputs being fed respectively over circuits x and y, so that in each core the effects due to these circuits are in opposition. In these circumstances inputs of 0 and 1 or 1 and 0 on x and y correspond to points F or C respectively to give an output of 1. Inputs of 0 and 0 or 1 and 1 correspond to point 0 and an output of 0. The arrangement may be used to encode telegraph signals which are applied to one of the circuits x, y, an arbitrary sequence of 1's and 0's being applied to the other circuit. The same circuit may be used for decoding at the receiver. Several such coding arrangements may be connected in cascade. Specifications 791,372 and 803,290 are referred to.
GB3950/59A 1958-02-04 1959-02-04 Improvements in or relating to electronic coding and decoding devices Expired GB905382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR757398 1958-02-04

Publications (1)

Publication Number Publication Date
GB905382A true GB905382A (en) 1962-09-05

Family

ID=8705654

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3950/59A Expired GB905382A (en) 1958-02-04 1959-02-04 Improvements in or relating to electronic coding and decoding devices

Country Status (6)

Country Link
US (1) US3085163A (en)
CH (1) CH363681A (en)
DE (1) DE1097484B (en)
FR (1) FR1198707A (en)
GB (1) GB905382A (en)
NL (1) NL130279C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247460A (en) * 1962-11-29 1966-04-19 Collins Radio Co D. c. amplifier utilizing saturable cores

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975610C (en) * 1939-02-14 1962-02-22 Siemens Ag Device for voltage regulation of alternating current circuits with direct current pre-magnetized choke coils
NL189000B (en) * 1953-07-30 Gen Electric PROCESS FOR PREPARING AROMATIC BIS (ETHERPHTALIC ANHYDRIDES).
US2846667A (en) * 1954-05-17 1958-08-05 Librascope Inc Magnetic pulse controlling device
US2809303A (en) * 1956-06-22 1957-10-08 Westinghouse Electric Corp Control systems for switching transistors

Also Published As

Publication number Publication date
FR1198707A (en) 1959-12-09
NL130279C (en) 1970-12-16
DE1097484B (en) 1961-01-19
CH363681A (en) 1962-08-15
US3085163A (en) 1963-04-09

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