CA941026A - Multi-frequency data receivers - Google Patents

Multi-frequency data receivers

Info

Publication number
CA941026A
CA941026A CA119,233A CA119233A CA941026A CA 941026 A CA941026 A CA 941026A CA 119233 A CA119233 A CA 119233A CA 941026 A CA941026 A CA 941026A
Authority
CA
Canada
Prior art keywords
frequency data
data receivers
receivers
frequency
data
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA119,233A
Other versions
CA119233S (en
Inventor
Leszek W. Sicinski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Handel und Investments AG
Original Assignee
Plessey Handel und Investments 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 Plessey Handel und Investments AG filed Critical Plessey Handel und Investments AG
Application granted granted Critical
Publication of CA941026A publication Critical patent/CA941026A/en
Expired legal-status Critical Current

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)
  • Interface Circuits In Exchanges (AREA)
CA119,233A 1970-07-31 1971-07-27 Multi-frequency data receivers Expired CA941026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3716170 1970-07-31

Publications (1)

Publication Number Publication Date
CA941026A true CA941026A (en) 1974-01-29

Family

ID=10394252

Family Applications (1)

Application Number Title Priority Date Filing Date
CA119,233A Expired CA941026A (en) 1970-07-31 1971-07-27 Multi-frequency data receivers

Country Status (5)

Country Link
AU (1) AU450736B2 (en)
BR (1) BR7104902D0 (en)
CA (1) CA941026A (en)
GB (1) GB1342904A (en)
ZA (1) ZA714899B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE396684B (en) * 1976-02-09 1977-09-26 Ericsson Telefon Ab L M HALL CIRCUIT IN A RECEIVER DEVICE FOR MFC SIGNALING
SE397763B (en) * 1976-03-09 1977-11-14 Ericsson Telefon Ab L M RECEIVER DEVICE FOR SENSITIVE DETECTION OF ATMINSTONE TWO TONE FREQUENCIES IN AN INCOMING TONE SIGNAL
JPS57171870A (en) * 1981-04-16 1982-10-22 Fujitsu Ltd Signal deciding circuit for digital multifrequency signal receiver
GB2305318A (en) * 1995-09-13 1997-04-02 Thomson Multimedia Sa Schmitt trigger for DTMF receiver

Also Published As

Publication number Publication date
AU3187371A (en) 1973-02-01
ZA714899B (en) 1972-04-26
BR7104902D0 (en) 1973-04-12
GB1342904A (en) 1974-01-10
AU450736B2 (en) 1974-07-18

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