ES451494A1 - Un circuito para un receptor de senal selectivo, particular-mente para su utilizacion en sistemas telefonicos. - Google Patents

Un circuito para un receptor de senal selectivo, particular-mente para su utilizacion en sistemas telefonicos.

Info

Publication number
ES451494A1
ES451494A1 ES451494A ES451494A ES451494A1 ES 451494 A1 ES451494 A1 ES 451494A1 ES 451494 A ES451494 A ES 451494A ES 451494 A ES451494 A ES 451494A ES 451494 A1 ES451494 A1 ES 451494A1
Authority
ES
Spain
Prior art keywords
signal
signal receiver
duration
interference
trigger circuit
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
ES451494A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES451494A1 publication Critical patent/ES451494A1/es
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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Radar Systems Or Details Thereof (AREA)
ES451494A 1975-09-13 1976-09-13 Un circuito para un receptor de senal selectivo, particular-mente para su utilizacion en sistemas telefonicos. Expired ES451494A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2540859A DE2540859C2 (de) 1975-09-13 1975-09-13 Schaltungsanordnung für einen selektiven Zeichenempfänger, insbesondere für Fernsprechanlagen

Publications (1)

Publication Number Publication Date
ES451494A1 true ES451494A1 (es) 1977-10-01

Family

ID=5956376

Family Applications (1)

Application Number Title Priority Date Filing Date
ES451494A Expired ES451494A1 (es) 1975-09-13 1976-09-13 Un circuito para un receptor de senal selectivo, particular-mente para su utilizacion en sistemas telefonicos.

Country Status (11)

Country Link
AT (1) AT353852B (de)
BE (1) BE846033R (de)
CH (1) CH625925A5 (de)
DE (1) DE2540859C2 (de)
DK (1) DK412176A (de)
ES (1) ES451494A1 (de)
FR (1) FR2324182A1 (de)
GB (1) GB1529758A (de)
NL (1) NL7609996A (de)
NO (1) NO763089L (de)
SE (1) SE7610009L (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2334426A1 (de) * 1973-07-06 1975-01-23 Telefonbau & Normalzeit Gmbh Auswerter fuer sprachgeschuetzte frequenzselektive zeichenempfaenger nach dem mehrfrequenzverfahren
DE2341224C3 (de) * 1973-08-16 1982-01-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Verfahren zur Frequenzerkennung in selektiven Zeichenempfängern für Fernmelde-, insbesondere Fernsprechanlagen
DE2341225B2 (de) * 1973-08-16 1976-10-28 Standard Elektrik Lorenz Ag, 7000 Stuttgart Selektiver zeichenempfaenger fuer fernmelde-, insbesondere fernsprechanlagen

Also Published As

Publication number Publication date
CH625925A5 (en) 1981-10-15
DE2540859C2 (de) 1984-01-12
AT353852B (de) 1979-12-10
FR2324182A1 (fr) 1977-04-08
BE846033R (nl) 1977-03-10
NL7609996A (nl) 1977-03-15
GB1529758A (en) 1978-10-25
SE7610009L (sv) 1977-03-14
NO763089L (de) 1977-03-15
ATA675776A (de) 1979-05-15
DE2540859A1 (de) 1977-03-17
DK412176A (da) 1977-03-14

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612