SE7504573L - Mottagare for multifrekventa signaler - Google Patents
Mottagare for multifrekventa signalerInfo
- Publication number
- SE7504573L SE7504573L SE7504573A SE7504573A SE7504573L SE 7504573 L SE7504573 L SE 7504573L SE 7504573 A SE7504573 A SE 7504573A SE 7504573 A SE7504573 A SE 7504573A SE 7504573 L SE7504573 L SE 7504573L
- Authority
- SE
- Sweden
- Prior art keywords
- tone
- frequencies
- output
- filters
- frequency
- Prior art date
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
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7414300A FR2269261B1 ( ) | 1974-04-24 | 1974-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7504573L true SE7504573L (sv) | 1975-10-27 |
Family
ID=9138073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7504573A SE7504573L (sv) | 1974-04-24 | 1975-04-21 | Mottagare for multifrekventa signaler |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE827409A ( ) |
CH (1) | CH592994A5 ( ) |
DE (1) | DE2517807A1 ( ) |
FR (1) | FR2269261B1 ( ) |
GB (1) | GB1501706A ( ) |
IE (1) | IE41016B1 ( ) |
IT (1) | IT1037582B ( ) |
NL (1) | NL7504828A ( ) |
SE (1) | SE7504573L ( ) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2370386A1 (fr) * | 1976-11-05 | 1978-06-02 | Constr Telephoniques | Melangeur pour recepteur de signaux multifrequences |
FR2485843B1 (fr) * | 1980-06-25 | 1986-11-07 | Cit Alcatel | Recepteur numerique de frequences |
-
1974
- 1974-04-24 FR FR7414300A patent/FR2269261B1/fr not_active Expired
-
1975
- 1975-04-01 BE BE1006560A patent/BE827409A/xx unknown
- 1975-04-07 CH CH407275A patent/CH592994A5/xx not_active IP Right Cessation
- 1975-04-21 GB GB1633575A patent/GB1501706A/en not_active Expired
- 1975-04-21 SE SE7504573A patent/SE7504573L/ not_active Application Discontinuation
- 1975-04-22 DE DE19752517807 patent/DE2517807A1/de not_active Withdrawn
- 1975-04-23 NL NL7504828A patent/NL7504828A/xx active Search and Examination
- 1975-04-23 IE IE90875A patent/IE41016B1/xx unknown
- 1975-04-23 IT IT2262175A patent/IT1037582B/it active
Also Published As
Publication number | Publication date |
---|---|
CH592994A5 ( ) | 1977-11-15 |
NL7504828A (nl) | 1975-10-28 |
DE2517807A1 (de) | 1975-11-06 |
BE827409A (fr) | 1975-10-01 |
IT1037582B (it) | 1979-11-20 |
IE41016L (en) | 1975-10-24 |
FR2269261B1 ( ) | 1976-12-17 |
GB1501706A (en) | 1978-02-22 |
IE41016B1 (en) | 1979-09-26 |
FR2269261A1 ( ) | 1975-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE7504573L (sv) | Mottagare for multifrekventa signaler | |
GB1253031A ( ) | ||
ES458597A1 (es) | Aparato para la indicacion digital de valores de medicion y verificacion electricos. | |
GB1193477A (en) | Improvements in or relating to Timing Information Recovery Circuits | |
ES456619A1 (es) | Un aparato receptor perfeccionado para la detencion de al menos dos frecuencias vocales de una senal de tono. | |
US4539697A (en) | FM Stereo demodulating circuit | |
GB1261837A (en) | Improvements in or relating to phase detection systems | |
US3668327A (en) | Carrier supply for multiplex communication system | |
SU866754A1 (ru) | Приемник частотно-манипулированных сигналов | |
JPS57171870A (en) | Signal deciding circuit for digital multifrequency signal receiver | |
SU913907A1 (ru) | Устройство для передачи сигналов тревоги и бедствия | |
GB1446909A (en) | Apparatus for the attenuation of undesired signals in complex- electrical signals | |
JPS55162607A (en) | Fm demodulation circuit | |
JPS5634203A (en) | Fm demodulator | |
SU924911A2 (ru) | Устройство сжати полосы частот факсимильного сигнала | |
SU780218A1 (ru) | Приемник сигналов, модулированных одновременно по частоте и по фазе | |
KR840002600A (ko) | 동조 장치 | |
SU944132A1 (ru) | Устройство дл синхронизации многочастотных сигналов | |
SU611287A1 (ru) | Демодул тор частотно-модулированного сигнала | |
SU647876A1 (ru) | Устройство синхронизации | |
CA1146287A (en) | Carrier frequency spectrum generator using logic level input pulses | |
SU508959A1 (ru) | Устройство дл передачи дискретнойинформации | |
JPS5531360A (en) | Demodulator circuit | |
GB898496A (en) | Improvements in or relating to speech-signal transmission systems | |
SU540401A1 (ru) | Приемник частотно-манипулированных сигналов |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 7504573-2 |