IT959148B - Ricevitore per processi di trasmis sione codificata a frequenze multi ple - Google Patents

Ricevitore per processi di trasmis sione codificata a frequenze multi ple

Info

Publication number
IT959148B
IT959148B IT6888772A IT6888772A IT959148B IT 959148 B IT959148 B IT 959148B IT 6888772 A IT6888772 A IT 6888772A IT 6888772 A IT6888772 A IT 6888772A IT 959148 B IT959148 B IT 959148B
Authority
IT
Italy
Prior art keywords
transmission process
coded transmission
frequency coded
multi ple
process receiver
Prior art date
Application number
IT6888772A
Other languages
English (en)
Original Assignee
Hasler 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 Hasler Ag filed Critical Hasler Ag
Application granted granted Critical
Publication of IT959148B publication Critical patent/IT959148B/it

Links

Classifications

    • 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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT6888772A 1971-06-18 1972-06-13 Ricevitore per processi di trasmis sione codificata a frequenze multi ple IT959148B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH881471A CH534468A (de) 1971-06-18 1971-06-18 Empfänger für Mehrfrequenzcode-Übertragungsverfahren

Publications (1)

Publication Number Publication Date
IT959148B true IT959148B (it) 1973-11-10

Family

ID=4345037

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6888772A IT959148B (it) 1971-06-18 1972-06-13 Ricevitore per processi di trasmis sione codificata a frequenze multi ple

Country Status (5)

Country Link
CH (1) CH534468A (it)
DE (1) DE2141867A1 (it)
FR (1) FR2141804A1 (it)
GB (1) GB1349818A (it)
IT (1) IT959148B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2299769A1 (fr) * 1975-01-31 1976-08-27 Telecommunications Sa Procede d'application
US4839842A (en) * 1987-07-24 1989-06-13 Advanced Micro Devices Digital tone detection and generation

Also Published As

Publication number Publication date
CH534468A (de) 1973-02-28
DE2141867A1 (de) 1972-12-21
FR2141804A1 (it) 1973-01-26
GB1349818A (en) 1974-04-10

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