CH224796A - Method for the transmission of signals in a system for telephony and phase reversal alternating current telegraphy. - Google Patents

Method for the transmission of signals in a system for telephony and phase reversal alternating current telegraphy.

Info

Publication number
CH224796A
CH224796A CH224796DA CH224796A CH 224796 A CH224796 A CH 224796A CH 224796D A CH224796D A CH 224796DA CH 224796 A CH224796 A CH 224796A
Authority
CH
Switzerland
Prior art keywords
telephony
signals
transmission
alternating current
phase reversal
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 CH224796A publication Critical patent/CH224796A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • 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
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/2057—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases with a separate carrier for each phase state
    • 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2334—Demodulator circuits; Receiver circuits using non-coherent demodulation using filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
CH224796D 1940-04-12 1941-08-29 Method for the transmission of signals in a system for telephony and phase reversal alternating current telegraphy. CH224796A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE120440X 1940-04-12

Publications (1)

Publication Number Publication Date
CH224796A true CH224796A (en) 1942-12-15

Family

ID=5656525

Family Applications (1)

Application Number Title Priority Date Filing Date
CH224796D CH224796A (en) 1940-04-12 1941-08-29 Method for the transmission of signals in a system for telephony and phase reversal alternating current telegraphy.

Country Status (4)

Country Link
BE (1) BE443031A (en)
CH (1) CH224796A (en)
FR (1) FR876083A (en)
NL (1) NL57075C (en)

Also Published As

Publication number Publication date
NL57075C (en)
FR876083A (en) 1942-10-13
BE443031A (en)

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