ES456619A1 - Un aparato receptor perfeccionado para la detencion de al menos dos frecuencias vocales de una senal de tono. - Google Patents
Un aparato receptor perfeccionado para la detencion de al menos dos frecuencias vocales de una senal de tono.Info
- Publication number
- ES456619A1 ES456619A1 ES456619A ES456619A ES456619A1 ES 456619 A1 ES456619 A1 ES 456619A1 ES 456619 A ES456619 A ES 456619A ES 456619 A ES456619 A ES 456619A ES 456619 A1 ES456619 A1 ES 456619A1
- Authority
- ES
- Spain
- Prior art keywords
- signal
- rectifier
- level
- incoming
- dependence
- 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
- H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Noise Elimination (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Radar Systems Or Details Thereof (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Un aparato receptor perfeccionado para la detección de al menos dos frecuencias vocales en una señal de tono entrante en transmisión de señales MFC insensible a perturbaciones, que incluye un número de canales de señal conectados en paralelo igual al número de las posibles frecuencias vocales contenidas en la señal de tono entrante, comprendiendo cada uno de los canales de señal un filtro de pasa banda sintonizado a una cierta frecuencia vocal, un rectificador y un comparador analógico de señal para comparar la señal obtenida del rectificador con una señal de referencia producida por un rectificador de referencia consiste en un primer canal de señal que incluye una primera disposición de circuito con el fin de crear un primer nivel de señal en dependencia del nivel de señal entrante para comparación con una señal obtenida de uno de los mencionados rectificadores, un segundo canal de señal que incluye una segunda disposición de circuito para crear un segundo nivel de señal en dependencia delnivel de señal entrante pero de valor inferior al valor de dicho primer nivel de señal, y porque están conectados cierto número de canales rectificadores entre la salida de cada comparador de señal y dicho primer canal de señal con el fin de bloquear la señal de salida del primer canal de señal en dependencia de dicha comparación, de modo que se efectúa una nueva comparación entre la señal de salida obtenida del segundo canal de señal y una señal obtenida de otro de dichos rectificadores.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7603136A SE397763B (sv) | 1976-03-09 | 1976-03-09 | Mottagaranordning for storningskenslig detektering av atminstone tva tonfrekvenser i en inkommande tonsignal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES456619A1 true ES456619A1 (es) | 1978-01-16 |
Family
ID=20327272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES456619A Expired ES456619A1 (es) | 1976-03-09 | 1977-03-08 | Un aparato receptor perfeccionado para la detencion de al menos dos frecuencias vocales de una senal de tono. |
Country Status (22)
| Country | Link |
|---|---|
| US (1) | US4107475A (es) |
| AR (1) | AR213111A1 (es) |
| AU (1) | AU501585B2 (es) |
| BR (1) | BR7700987A (es) |
| CA (1) | CA1064633A (es) |
| DE (1) | DE2702026C2 (es) |
| DK (1) | DK142719B (es) |
| EG (1) | EG13315A (es) |
| ES (1) | ES456619A1 (es) |
| FI (1) | FI60802C (es) |
| FR (1) | FR2344190A1 (es) |
| GB (1) | GB1544174A (es) |
| HU (1) | HU176229B (es) |
| IE (1) | IE45187B1 (es) |
| IN (1) | IN155829B (es) |
| IT (1) | IT1085209B (es) |
| MY (1) | MY8000166A (es) |
| NL (1) | NL186486C (es) |
| NO (1) | NO140085C (es) |
| SE (1) | SE397763B (es) |
| SU (1) | SU656562A3 (es) |
| YU (1) | YU41466B (es) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227055A (en) * | 1978-12-07 | 1980-10-07 | Bell Telephone Laboratories, Incorporated | Multifrequency receiver |
| US4395595A (en) * | 1980-04-23 | 1983-07-26 | Nippon Electric Co., Ltd. | Digital pushbutton signalling receiver |
| US4385208A (en) * | 1981-04-15 | 1983-05-24 | Bell Telephone Laboratories, Incorporated | Multifrequency receiver |
| US4489280A (en) * | 1982-07-15 | 1984-12-18 | Sperry Corporation | Signal harmonic processor |
| US4599495A (en) * | 1985-02-28 | 1986-07-08 | Northern Telecom Limited | Apparatus for multifrequency signalling tone detection |
| DE3710695A1 (de) * | 1987-03-31 | 1988-10-20 | Nixdorf Computer Ag | Schaltungsanordnung zum erkennen von doppelton-mehrfrequenzsignalen in fernsprechanlagen |
| US20080068132A1 (en) * | 2006-05-16 | 2008-03-20 | Georges Kayanakis | Contactless radiofrequency device featuring several antennas and related antenna selection circuit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1487973B2 (de) * | 1966-05-12 | 1970-10-08 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung für einen sprachgeschützten Ein- oder Mehrfrequenz-Signalempfänger |
| GB1342904A (en) * | 1970-07-31 | 1974-01-10 | Plessey Telecommunications Res | Multifrequency data receivers |
| NL7101521A (es) * | 1971-02-05 | 1972-08-08 | ||
| US3934096A (en) * | 1973-04-27 | 1976-01-20 | Hitachi, Ltd. | Multi-frequency signal receiving circuit |
| US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
| JPS5543677B2 (es) * | 1974-05-15 | 1980-11-07 | ||
| DE2517024C3 (de) * | 1975-04-17 | 1978-03-02 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung für einen Signalempfänger zum Sperren von Signalen, deren Pegel schwankt |
| SE396684B (sv) * | 1976-02-09 | 1977-09-26 | Ericsson Telefon Ab L M | Hallkrets i en mottagaranordning for mfc-signalering |
-
1976
- 1976-03-09 SE SE7603136A patent/SE397763B/xx not_active IP Right Cessation
- 1976-12-28 IN IN2274/CAL/76A patent/IN155829B/en unknown
-
1977
- 1977-01-03 US US05/756,115 patent/US4107475A/en not_active Expired - Lifetime
- 1977-01-04 FI FI770021A patent/FI60802C/sv not_active IP Right Cessation
- 1977-01-06 CA CA269,275A patent/CA1064633A/en not_active Expired
- 1977-01-19 AU AU21438/77A patent/AU501585B2/en not_active Expired
- 1977-01-19 DE DE2702026A patent/DE2702026C2/de not_active Expired
- 1977-01-21 NL NLAANVRAGE7700640,A patent/NL186486C/xx not_active IP Right Cessation
- 1977-02-02 SU SU772447655A patent/SU656562A3/ru active
- 1977-02-07 EG EG73/77A patent/EG13315A/xx active
- 1977-02-17 BR BR7700987A patent/BR7700987A/pt unknown
- 1977-02-17 AR AR263584A patent/AR213111A1/es active
- 1977-02-22 FR FR7705095A patent/FR2344190A1/fr active Granted
- 1977-02-23 GB GB7714/77A patent/GB1544174A/en not_active Expired
- 1977-02-28 IE IE432/77A patent/IE45187B1/en not_active IP Right Cessation
- 1977-03-08 ES ES456619A patent/ES456619A1/es not_active Expired
- 1977-03-08 YU YU622/77A patent/YU41466B/xx unknown
- 1977-03-08 NO NO770816A patent/NO140085C/no unknown
- 1977-03-08 HU HU77EI731A patent/HU176229B/hu unknown
- 1977-03-08 DK DK101977AA patent/DK142719B/da not_active IP Right Cessation
- 1977-03-08 IT IT21036/77A patent/IT1085209B/it active
-
1980
- 1980-12-30 MY MY166/80A patent/MY8000166A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO140085B (no) | 1979-03-19 |
| SE7603136L (sv) | 1977-09-10 |
| FI60802B (fi) | 1981-11-30 |
| SU656562A3 (ru) | 1979-04-05 |
| FR2344190A1 (fr) | 1977-10-07 |
| DK101977A (es) | 1977-09-10 |
| NL7700640A (nl) | 1977-09-13 |
| DE2702026A1 (de) | 1977-09-15 |
| BR7700987A (pt) | 1977-10-18 |
| HU176229B (en) | 1981-01-28 |
| GB1544174A (en) | 1979-04-11 |
| IN155829B (es) | 1985-03-16 |
| NO770816L (no) | 1977-09-12 |
| IT1085209B (it) | 1985-05-28 |
| CA1064633A (en) | 1979-10-16 |
| AU501585B2 (en) | 1979-06-21 |
| YU41466B (en) | 1987-08-31 |
| AU2143877A (en) | 1978-07-27 |
| MY8000166A (en) | 1980-12-31 |
| NO140085C (no) | 1979-07-04 |
| DK142719C (es) | 1981-08-10 |
| SE397763B (sv) | 1977-11-14 |
| DE2702026C2 (de) | 1985-10-24 |
| US4107475A (en) | 1978-08-15 |
| EG13315A (en) | 1981-03-31 |
| NL186486B (nl) | 1990-07-02 |
| NL186486C (nl) | 1990-12-03 |
| FR2344190B1 (es) | 1983-10-07 |
| AR213111A1 (es) | 1978-12-15 |
| FI60802C (fi) | 1982-03-10 |
| FI770021A (es) | 1977-09-10 |
| YU62277A (en) | 1982-05-31 |
| IE45187L (en) | 1977-09-09 |
| IE45187B1 (en) | 1982-07-14 |
| DK142719B (da) | 1980-12-29 |
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