ES401437A1 - Perfeccionamientos introducidos en circuitos para la deco- dificacion digital de senales codificadas en frecuencia. - Google Patents
Perfeccionamientos introducidos en circuitos para la deco- dificacion digital de senales codificadas en frecuencia.Info
- Publication number
- ES401437A1 ES401437A1 ES401437A ES401437A ES401437A1 ES 401437 A1 ES401437 A1 ES 401437A1 ES 401437 A ES401437 A ES 401437A ES 401437 A ES401437 A ES 401437A ES 401437 A1 ES401437 A1 ES 401437A1
- Authority
- ES
- Spain
- Prior art keywords
- frequency
- computation
- input
- circuit
- circuits
- 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)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Analogue/Digital Conversion (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Noise Elimination (AREA)
Abstract
Perfeccionamientos introducidos en circuitos para la decodificación digital de señales codificadas en frecuencia con protección contra componentes vocales y de ruido que imitan señales de la red, caracterizados porque se aplica un mínimo de una sección de señal codificada en frecuencia recibida a la primera entrada de al menos un circuito "Y" (13,63) abierto solamente durante una semionda completa de la sección de señal recibida, siendo alimentada la segunda entrada de dicho circuito (s) por una tensión de corriente alterna de medida de una frecuencia dada (122 Kcps), porque la salida de cada uno de los circuitos "Y" (13,63) dispuestos está conectada a la entrada de cómputo (ZE) de un contador (14,64) respectivo, porque las salidas (ZA) de cómputo y/o las salidas (ZA) de cómputo invertido de todos los contadores (14,64) dispuestos están conectados a las entradas de un circuito (51) lógico de evaluación que se compone de elementos conocidos en sí, de acuerdo con reglas dadas, y porque puedenser suministrados niveles de señal para la indicación de la información (A1.B4) discriminada y/o decodificada desde las salidas (X1-Y4) del circuito (51) lógico de evaluación
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 |
---|---|
ES401437A1 true ES401437A1 (es) | 1975-10-01 |
Family
ID=5803944
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES401435A Expired ES401435A1 (es) | 1971-04-05 | 1972-04-04 | Un metodo para la decodificacion digital de senales codifi-cadas en frecuencia. |
ES401437A Expired ES401437A1 (es) | 1971-04-05 | 1972-04-04 | Perfeccionamientos introducidos en circuitos para la deco- dificacion digital de senales codificadas en frecuencia. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES401435A Expired ES401435A1 (es) | 1971-04-05 | 1972-04-04 | Un metodo para la decodificacion digital de senales codifi-cadas en frecuencia. |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS5317015B1 (es) |
BR (2) | BR7101977D0 (es) |
CA (1) | CA974645A (es) |
CH (1) | CH540622A (es) |
DE (1) | DE2116635C3 (es) |
ES (2) | ES401435A1 (es) |
FR (1) | FR2132303B1 (es) |
GB (1) | GB1364773A (es) |
IT (1) | IT947887B (es) |
NL (1) | NL167827C (es) |
SE (1) | SE384619B (es) |
Families Citing this family (7)
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)
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 (es) * | 1967-09-15 | 1969-03-18 |
-
1971
- 1971-04-05 DE DE19712116635 patent/DE2116635C3/de not_active Expired
- 1971-04-05 BR BR197771A patent/BR7101977D0/pt unknown
-
1972
- 1972-02-25 IT IT2101672A patent/IT947887B/it active
- 1972-03-06 SE SE282972A patent/SE384619B/xx unknown
- 1972-03-16 GB GB1222972A patent/GB1364773A/en not_active Expired
- 1972-03-23 CH CH436872A patent/CH540622A/de not_active IP Right Cessation
- 1972-03-28 FR FR7211397A patent/FR2132303B1/fr not_active Expired
- 1972-03-29 NL NL7204207A patent/NL167827C/xx not_active IP Right Cessation
- 1972-03-29 CA CA138,503A patent/CA974645A/en not_active Expired
- 1972-04-03 JP JP3271072A patent/JPS5317015B1/ja active Pending
- 1972-04-04 ES ES401435A patent/ES401435A1/es not_active Expired
- 1972-04-04 ES ES401437A patent/ES401437A1/es not_active Expired
- 1972-04-05 BR BR197772A patent/BR7201977D0/pt unknown
Also Published As
Publication number | Publication date |
---|---|
NL7204207A (es) | 1972-10-09 |
DE2116635B2 (de) | 1973-10-04 |
DE2116635C3 (de) | 1978-10-05 |
CH540622A (de) | 1973-08-15 |
FR2132303A1 (es) | 1972-11-17 |
BR7101977D0 (pt) | 1973-06-14 |
ES401435A1 (es) | 1975-02-16 |
IT947887B (it) | 1973-05-30 |
FR2132303B1 (es) | 1974-08-02 |
CA974645A (en) | 1975-09-16 |
JPS5317015B1 (es) | 1978-06-05 |
BR7201977D0 (pt) | 1974-11-12 |
NL167827C (nl) | 1982-01-18 |
DE2116635A1 (de) | 1972-10-19 |
GB1364773A (en) | 1974-08-29 |
SE384619B (sv) | 1976-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ATE14946T1 (de) | Schaltungsanordnung zur ueberwachung eines mikroprozessors. | |
ES401437A1 (es) | Perfeccionamientos introducidos en circuitos para la deco- dificacion digital de senales codificadas en frecuencia. | |
JPS55117336A (en) | Logic circuit | |
GB933534A (en) | Binary adder | |
GB1278632A (en) | Improvements relating to measuring and testing electrical circuits | |
GB1501279A (en) | N scale counter | |
FI831404A0 (fi) | Digital oevervakningskrets foer telefonsystem | |
GB981922A (en) | Data processing apparatus | |
KR840000123A (ko) | 이중 모우드 음색검출기 회로 | |
GB1469904A (en) | Checking circuit for use in computers | |
GB836237A (en) | Electrical comparator network | |
JPS554178A (en) | Information control system | |
JPS57132268A (en) | Digital signal processing circuit | |
JPS5537924A (en) | Integrated circuit | |
SU394922A1 (ru) | N-стабильный асинхронный триггер | |
JPS5725744A (en) | Interleaving circuit | |
SU486285A1 (ru) | Преобразователь сдвига фазы переменного напр жени в непрерывный ток | |
JPS57105053A (en) | Integrated circuit which has incorporated testing circuit for fault detecting circuit | |
JPS5599863A (en) | Code error detection circuit | |
JPS56159723A (en) | Clock switching control system | |
JPS57207828A (en) | Signal converter | |
JPS57178543A (en) | Digital comparator | |
JPS57140024A (en) | Signal detecting circuit | |
GB1402119A (en) | Telecommunications characteristics receivers | |
JPS5725745A (en) | Interleaving circuit |