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AU450736B2 - Improvements in multi-frequency data receivers - Google Patents
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AU450736B2 - Improvements in multi-frequency data receivers - Google Patents

Improvements in multi-frequency data receivers

Info

Publication number
AU450736B2
AU450736B2 AU31873/71A AU3187371A AU450736B2 AU 450736 B2 AU450736 B2 AU 450736B2 AU 31873/71 A AU31873/71 A AU 31873/71A AU 3187371 A AU3187371 A AU 3187371A AU 450736 B2 AU450736 B2 AU 450736B2
Authority
AU
Australia
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
AU31873/71A
Other versions
AU3187371A (en
Inventor
Walerian Sicinski Leszek
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 Overseas Ltd
Original Assignee
Plessey Overseas Ltd
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 Overseas Ltd filed Critical Plessey Overseas Ltd
Publication of AU3187371A publication Critical patent/AU3187371A/en
Application granted granted Critical
Publication of AU450736B2 publication Critical patent/AU450736B2/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)
  • Interface Circuits In Exchanges (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
AU31873/71A 1970-07-31 1971-07-30 Improvements in multi-frequency data receivers Expired AU450736B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB37161 1970-07-31
GB3716170 1970-07-31

Publications (2)

Publication Number Publication Date
AU3187371A AU3187371A (en) 1973-02-01
AU450736B2 true AU450736B2 (en) 1974-07-18

Family

ID=10394252

Family Applications (1)

Application Number Title Priority Date Filing Date
AU31873/71A Expired AU450736B2 (en) 1970-07-31 1971-07-30 Improvements in 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 (5)

* 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
RU2169436C1 (en) * 2000-01-20 2001-06-20 Войсковая часть 35533 Device to receive multifrequency signals

Also Published As

Publication number Publication date
GB1342904A (en) 1974-01-10
CA941026A (en) 1974-01-29
BR7104902D0 (en) 1973-04-12
AU3187371A (en) 1973-02-01
ZA714899B (en) 1972-04-26

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