CH235872A - Circuit arrangement for phase reversal alternating current telegraphy. - Google Patents

Circuit arrangement for phase reversal alternating current telegraphy.

Info

Publication number
CH235872A
CH235872A CH235872DA CH235872A CH 235872 A CH235872 A CH 235872A CH 235872D A CH235872D A CH 235872DA CH 235872 A CH235872 A CH 235872A
Authority
CH
Switzerland
Prior art keywords
alternating current
circuit arrangement
phase reversal
current telegraphy
telegraphy
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft C Lorenz
Original Assignee
Lorenz C Ag
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 Lorenz C Ag filed Critical Lorenz C Ag
Publication of CH235872A publication Critical patent/CH235872A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H04L27/2276—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using frequency multiplication or harmonic tracking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
CH235872D 1942-04-02 1942-12-30 Circuit arrangement for phase reversal alternating current telegraphy. CH235872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL107394D DE762852C (en) 1942-04-02 1942-04-02 Circuit arrangement for alternating current telegraphy in which an alternating voltage in the modulator is controlled with double current and in which the incoming frequency is doubled on the receiving side and a generator is controlled from the original frequency with the doubled frequency

Publications (1)

Publication Number Publication Date
CH235872A true CH235872A (en) 1944-12-31

Family

ID=6538210

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235872D CH235872A (en) 1942-04-02 1942-12-30 Circuit arrangement for phase reversal alternating current telegraphy.

Country Status (4)

Country Link
BE (1) BE449061A (en)
CH (1) CH235872A (en)
DE (1) DE762852C (en)
FR (1) FR891610A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559642A (en) * 1923-08-28 1925-11-03 American Telephone & Telegraph Signaling with phase reversals

Also Published As

Publication number Publication date
FR891610A (en) 1944-03-13
BE449061A (en) 1943-03-31
DE762852C (en) 1954-07-26

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