BR7104902D0 - IMPROVEMENTS IN MULTIPLE FREQUENCY RECEPTORS - Google Patents

IMPROVEMENTS IN MULTIPLE FREQUENCY RECEPTORS

Info

Publication number
BR7104902D0
BR7104902D0 BR4902/71A BR490271A BR7104902D0 BR 7104902 D0 BR7104902 D0 BR 7104902D0 BR 4902/71 A BR4902/71 A BR 4902/71A BR 490271 A BR490271 A BR 490271A BR 7104902 D0 BR7104902 D0 BR 7104902D0
Authority
BR
Brazil
Prior art keywords
multiple frequency
receptors
frequency receptors
frequency
Prior art date
Application number
BR4902/71A
Other languages
Portuguese (pt)
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 BR7104902D0 publication Critical patent/BR7104902D0/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
BR4902/71A 1970-07-31 1971-07-30 IMPROVEMENTS IN MULTIPLE FREQUENCY RECEPTORS BR7104902D0 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BR7104902D0 true BR7104902D0 (en) 1973-04-12

Family

ID=10394252

Family Applications (1)

Application Number Title Priority Date Filing Date
BR4902/71A BR7104902D0 (en) 1970-07-31 1971-07-30 IMPROVEMENTS IN MULTIPLE FREQUENCY RECEPTORS

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
CA941026A (en) 1974-01-29
GB1342904A (en) 1974-01-10
AU450736B2 (en) 1974-07-18
ZA714899B (en) 1972-04-26
AU3187371A (en) 1973-02-01

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