BR7201977D0 - Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia condificada - Google Patents

Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia condificada

Info

Publication number
BR7201977D0
BR7201977D0 BR197772A BR197772A BR7201977D0 BR 7201977 D0 BR7201977 D0 BR 7201977D0 BR 197772 A BR197772 A BR 197772A BR 197772 A BR197772 A BR 197772A BR 7201977 D0 BR7201977 D0 BR 7201977D0
Authority
BR
Brazil
Prior art keywords
condified
provisions
circuit processes
digital decoding
frequency signs
Prior art date
Application number
BR197772A
Other languages
English (en)
Inventor
V Diehl
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of BR7201977D0 publication Critical patent/BR7201977D0/pt

Links

BR197772A 1971-04-05 1972-04-05 Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia condificada BR7201977D0 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712116635 DE2116635C3 (de) 1971-04-05 1971-04-05 Verfahren zur digitalen Decodierung frequenzcodierter Signale und Schaltungsanordnung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
BR7201977D0 true BR7201977D0 (pt) 1974-11-12

Family

ID=5803944

Family Applications (2)

Application Number Title Priority Date Filing Date
BR197771A BR7101977D0 (pt) 1971-04-05 1971-04-05 Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia codificada
BR197772A BR7201977D0 (pt) 1971-04-05 1972-04-05 Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia condificada

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BR197771A BR7101977D0 (pt) 1971-04-05 1971-04-05 Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia codificada

Country Status (11)

Country Link
JP (1) JPS5317015B1 (pt)
BR (2) BR7101977D0 (pt)
CA (1) CA974645A (pt)
CH (1) CH540622A (pt)
DE (1) DE2116635C3 (pt)
ES (2) ES401437A1 (pt)
FR (1) FR2132303B1 (pt)
GB (1) GB1364773A (pt)
IT (1) IT947887B (pt)
NL (1) NL167827C (pt)
SE (1) SE384619B (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936801A (en) * 1974-09-12 1976-02-03 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver timing circuit
CA1031086A (en) * 1976-03-03 1978-05-09 Northern Electric Company Method and apparatus for translating multiple frequency signalling
DE2712847C3 (de) * 1977-03-23 1979-12-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Sprachgeschützter frequenzselektiver Zeichenempfänger
US4328398A (en) * 1979-05-22 1982-05-04 Oki Electric Industry Co., Ltd. Digital multi-frequency receiver
DE3026016C2 (de) * 1980-07-09 1984-12-13 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Demodulation von Frequenzgemischen, die an einer Zentralstation empfangen werden
DE3115151A1 (de) * 1981-04-15 1982-11-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur auswertung von aus mehreren gleichzeitig uebertragenen wechselstroemen unterschiedlicher signalfrequenzen gebildeten wechselstromsignalen, in fernmeldeanlagen
SE9202065L (sv) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1511133A (fr) * 1966-12-16 1968-01-26 Ass Ouvriers Instr Precision Procédé d'identification de chacune des fréquences d'un groupe de plusieurs fréquences déterminées et appareil récepteur pour la mise en oeuvre de ce procédé
NL6712685A (pt) * 1967-09-15 1969-03-18

Also Published As

Publication number Publication date
GB1364773A (en) 1974-08-29
FR2132303A1 (pt) 1972-11-17
DE2116635A1 (de) 1972-10-19
NL167827C (nl) 1982-01-18
DE2116635C3 (de) 1978-10-05
IT947887B (it) 1973-05-30
CA974645A (en) 1975-09-16
CH540622A (de) 1973-08-15
ES401435A1 (es) 1975-02-16
NL7204207A (pt) 1972-10-09
JPS5317015B1 (pt) 1978-06-05
BR7101977D0 (pt) 1973-06-14
SE384619B (sv) 1976-05-10
DE2116635B2 (de) 1973-10-04
FR2132303B1 (pt) 1974-08-02
ES401437A1 (es) 1975-10-01

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