FR2378406A1 - Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce - Google Patents

Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce

Info

Publication number
FR2378406A1
FR2378406A1 FR7701627A FR7701627A FR2378406A1 FR 2378406 A1 FR2378406 A1 FR 2378406A1 FR 7701627 A FR7701627 A FR 7701627A FR 7701627 A FR7701627 A FR 7701627A FR 2378406 A1 FR2378406 A1 FR 2378406A1
Authority
FR
France
Prior art keywords
signals
morse
time base
binary coded
identify
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Withdrawn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
FR7701627A
Other languages
French (fr)
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.)
VO NHUT NGO
Original Assignee
VO NHUT NGO
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 VO NHUT NGO filed Critical VO NHUT NGO
Priority to FR7701627A priority Critical patent/FR2378406A1/en
Publication of FR2378406A1 publication Critical patent/FR2378406A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/4025—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code constant length to or from Morse code conversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Morse code signals used for transmission of information are converted automatically into binary coded signals to produce clear text. This overcomes risks of errors due to operator physical and mental conditions such as fatigue. High speed morse code signals are received and processed to eliminate key bounce and other parasitic effects to produce signals compatible with logic circuits. A Schmitt trigger regenerates the signals which are then measured against a time base to identify the codes. The time base operates a square wave generator whose output is counted by a four bit counter. The counter outputs are gated to produce binary coded elements and also control signals.
FR7701627A 1977-01-20 1977-01-20 Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce Withdrawn FR2378406A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7701627A FR2378406A1 (en) 1977-01-20 1977-01-20 Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7701627A FR2378406A1 (en) 1977-01-20 1977-01-20 Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce

Publications (1)

Publication Number Publication Date
FR2378406A1 true FR2378406A1 (en) 1978-08-18

Family

ID=9185726

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7701627A Withdrawn FR2378406A1 (en) 1977-01-20 1977-01-20 Automatic conversion of Morse into binary coded signals - employs time base to identify Morse codes and applies processing to eliminate parasitic signals esp. key bounce

Country Status (1)

Country Link
FR (1) FR2378406A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR730534A (en) * 1932-01-26 1932-08-17 Int Communications Lab Inc Conventional alphabet signal receiver-printer, for cable telegraphy
US2894067A (en) * 1954-05-28 1959-07-07 Arthur H Hausman Code translator
US2996577A (en) * 1955-12-13 1961-08-15 Cgs Lab Inc Methods and apparatus for automatic conversion of international morse code signals to teleprinter code
US3196210A (en) * 1959-11-12 1965-07-20 Murray Bradley Morse-to-binary code translator
GB1172946A (en) * 1968-08-15 1969-12-03 Standard Telephones Cables Ltd Code Converter
US3505667A (en) * 1965-04-30 1970-04-07 Rca Corp Code converter
US3895185A (en) * 1973-12-03 1975-07-15 Robert W Ramsey Tree counter code simulator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR730534A (en) * 1932-01-26 1932-08-17 Int Communications Lab Inc Conventional alphabet signal receiver-printer, for cable telegraphy
US2894067A (en) * 1954-05-28 1959-07-07 Arthur H Hausman Code translator
US2996577A (en) * 1955-12-13 1961-08-15 Cgs Lab Inc Methods and apparatus for automatic conversion of international morse code signals to teleprinter code
US3196210A (en) * 1959-11-12 1965-07-20 Murray Bradley Morse-to-binary code translator
US3505667A (en) * 1965-04-30 1970-04-07 Rca Corp Code converter
GB1172946A (en) * 1968-08-15 1969-12-03 Standard Telephones Cables Ltd Code Converter
US3895185A (en) * 1973-12-03 1975-07-15 Robert W Ramsey Tree counter code simulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

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