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ZA714899B - Improvements in multi-frequency data receivers - Google Patents

Improvements in multi-frequency data receivers

Info

Publication number
ZA714899B
ZA714899B ZA714899A ZA714899A ZA714899B ZA 714899 B ZA714899 B ZA 714899B ZA 714899 A ZA714899 A ZA 714899A ZA 714899 A ZA714899 A ZA 714899A ZA 714899 B ZA714899 B ZA 714899B
Authority
ZA
South Africa
Prior art keywords
frequency data
data receivers
receivers
frequency
data
Prior art date
Application number
ZA714899A
Inventor
L Sicinski
Original Assignee
Plessey Handel Investment 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 Investment Ag filed Critical Plessey Handel Investment Ag
Publication of ZA714899B publication Critical patent/ZA714899B/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)
  • Interface Circuits In Exchanges (AREA)
ZA714899A 1970-07-31 1971-07-22 Improvements in multi-frequency data receivers ZA714899B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ZA714899B true ZA714899B (en) 1972-04-26

Family

ID=10394252

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA714899A ZA714899B (en) 1970-07-31 1971-07-22 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
BR7104902D0 (en) 1973-04-12
GB1342904A (en) 1974-01-10
CA941026A (en) 1974-01-29
AU450736B2 (en) 1974-07-18
AU3187371A (en) 1973-02-01

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