IT1037582B - MULTIFREQUENCY SIGNAL RECEIVER - Google Patents

MULTIFREQUENCY SIGNAL RECEIVER

Info

Publication number
IT1037582B
IT1037582B IT2262175A IT2262175A IT1037582B IT 1037582 B IT1037582 B IT 1037582B IT 2262175 A IT2262175 A IT 2262175A IT 2262175 A IT2262175 A IT 2262175A IT 1037582 B IT1037582 B IT 1037582B
Authority
IT
Italy
Prior art keywords
signal receiver
multifrequency signal
multifrequency
receiver
signal
Prior art date
Application number
IT2262175A
Other languages
Italian (it)
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Application granted granted Critical
Publication of IT1037582B publication Critical patent/IT1037582B/en

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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT2262175A 1974-04-24 1975-04-23 MULTIFREQUENCY SIGNAL RECEIVER IT1037582B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7414300A FR2269261B1 (en) 1974-04-24 1974-04-24

Publications (1)

Publication Number Publication Date
IT1037582B true IT1037582B (en) 1979-11-20

Family

ID=9138073

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2262175A IT1037582B (en) 1974-04-24 1975-04-23 MULTIFREQUENCY SIGNAL RECEIVER

Country Status (9)

Country Link
BE (1) BE827409A (en)
CH (1) CH592994A5 (en)
DE (1) DE2517807A1 (en)
FR (1) FR2269261B1 (en)
GB (1) GB1501706A (en)
IE (1) IE41016B1 (en)
IT (1) IT1037582B (en)
NL (1) NL7504828A (en)
SE (1) SE7504573L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370386A1 (en) * 1976-11-05 1978-06-02 Constr Telephoniques MIXER FOR MULTIFREQUENCY SIGNAL RECEIVER
FR2485843B1 (en) * 1980-06-25 1986-11-07 Cit Alcatel DIGITAL FREQUENCY RECEIVER

Also Published As

Publication number Publication date
SE7504573L (en) 1975-10-27
NL7504828A (en) 1975-10-28
FR2269261B1 (en) 1976-12-17
IE41016B1 (en) 1979-09-26
IE41016L (en) 1975-10-24
GB1501706A (en) 1978-02-22
BE827409A (en) 1975-10-01
FR2269261A1 (en) 1975-11-21
CH592994A5 (en) 1977-11-15
DE2517807A1 (en) 1975-11-06

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