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
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)
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)
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 |
-
1975
- 1975-09-13 DE DE2540859A patent/DE2540859C2/de not_active Expired
-
1976
- 1976-09-09 NO NO763089A patent/NO763089L/no unknown
- 1976-09-09 NL NL7609996A patent/NL7609996A/xx not_active Application Discontinuation
- 1976-09-09 GB GB37380/76A patent/GB1529758A/en not_active Expired
- 1976-09-10 CH CH1150576A patent/CH625925A5/de not_active IP Right Cessation
- 1976-09-10 BE BE2055295A patent/BE846033R/xx active
- 1976-09-10 SE SE7610009A patent/SE7610009L/xx unknown
- 1976-09-13 FR FR7627478A patent/FR2324182A1/fr not_active Withdrawn
- 1976-09-13 DK DK412176A patent/DK412176A/da unknown
- 1976-09-13 AT AT675776A patent/AT353852B/de not_active IP Right Cessation
- 1976-09-13 ES ES451494A patent/ES451494A1/es not_active Expired
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 |