CH256126A - Dual current voice frequency telegraphic transmission device. - Google Patents

Dual current voice frequency telegraphic transmission device.

Info

Publication number
CH256126A
CH256126A CH256126DA CH256126A CH 256126 A CH256126 A CH 256126A CH 256126D A CH256126D A CH 256126DA CH 256126 A CH256126 A CH 256126A
Authority
CH
Switzerland
Prior art keywords
transmission device
voice frequency
current voice
dual current
telegraphic transmission
Prior art date
Application number
Other languages
French (fr)
Inventor
Compagnie Generale D'electricite
Original Assignee
Comp Generale Electricite
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 Comp Generale Electricite filed Critical Comp Generale Electricite
Publication of CH256126A publication Critical patent/CH256126A/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
    • 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
    • H04L27/2035—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 a single or unspecified number of carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
CH256126D 1943-03-12 1944-03-23 Dual current voice frequency telegraphic transmission device. CH256126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR895986T 1943-03-12

Publications (1)

Publication Number Publication Date
CH256126A true CH256126A (en) 1948-07-31

Family

ID=9390980

Family Applications (1)

Application Number Title Priority Date Filing Date
CH256126D CH256126A (en) 1943-03-12 1944-03-23 Dual current voice frequency telegraphic transmission device.

Country Status (5)

Country Link
BE (1) BE454533A (en)
CH (1) CH256126A (en)
FR (1) FR895986A (en)
GB (1) GB618589A (en)
NL (1) NL61637C (en)

Also Published As

Publication number Publication date
FR895986A (en) 1945-02-08
NL61637C (en)
GB618589A (en) 1949-02-24
BE454533A (en)

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