CH600684A5 - - Google Patents
Info
- Publication number
- CH600684A5 CH600684A5 CH1177575A CH1177575A CH600684A5 CH 600684 A5 CH600684 A5 CH 600684A5 CH 1177575 A CH1177575 A CH 1177575A CH 1177575 A CH1177575 A CH 1177575A CH 600684 A5 CH600684 A5 CH 600684A5
- Authority
- CH
- Switzerland
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
-
- 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)
- Synchronisation In Digital Transmission Systems (AREA)
- Electronic Switches (AREA)
- Electric Clocks (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/505,204 US3936801A (en) | 1974-09-12 | 1974-09-12 | Multifrequency signal receiver timing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH600684A5 true CH600684A5 (US06235095-20010522-C00021.png) | 1978-06-30 |
Family
ID=24009425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1177575A CH600684A5 (US06235095-20010522-C00021.png) | 1974-09-12 | 1975-09-11 |
Country Status (11)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023105A (en) * | 1975-08-25 | 1977-05-10 | Rca Corporation | Counter type remote control receiver producing binary outputs correlated with numerical commands of a companion remote control transmitter |
| CA1031086A (en) * | 1976-03-03 | 1978-05-09 | Northern Electric Company | Method and apparatus for translating multiple frequency signalling |
| US4076962A (en) * | 1977-03-07 | 1978-02-28 | Bell Telephone Laboratories, Incorporated | Method and apparatus for receiving disparate sequences of spaced tone bursts |
| US4091243A (en) * | 1977-07-26 | 1978-05-23 | Bell Telephone Laboratories, Incorporated | Multifrequency signal receiver |
| CA1137565A (en) * | 1979-05-22 | 1982-12-14 | Masaharu Kawaguchi | Digital multi-frequency receiver |
| US4385398A (en) * | 1979-06-07 | 1983-05-24 | Keith H. Wycoff | Selective call communication receiver |
| CA1290083C (en) * | 1987-06-10 | 1991-10-01 | Grass Valley Group, Inc. (The) | Analog "blue" signal detector |
| US6473826B1 (en) * | 1999-04-20 | 2002-10-29 | Adaptec, Inc. | PCI delayed transaction time out counter and associated methods |
| US6751303B1 (en) * | 2002-06-28 | 2004-06-15 | Sprint Communications Company L.P. | Data communication over telephone voice channel using DTMF interface |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1138436B (de) * | 1960-08-22 | 1962-10-25 | Western Electric Co | Signalempfaenger fuer Fernmelde-, insbesondere Fernsprechanlagen |
| US3281790A (en) * | 1963-04-01 | 1966-10-25 | Bell Telephone Labor Inc | Multifrequency signaling receiver circuit |
| FR1339209A (fr) * | 1963-04-06 | 1963-10-04 | Int Standard Electric Corp | Récepteur à fréquences vocales |
| US3288940A (en) * | 1963-10-24 | 1966-11-29 | Automatic Elect Lab | Multifrequency signal receiver |
| US3718918A (en) * | 1969-12-01 | 1973-02-27 | Atomic Energy Authority Uk | Nuclear explosion detection systems |
| FR2127450A5 (US06235095-20010522-C00021.png) * | 1971-03-03 | 1972-10-13 | Ibm France | |
| BR7101977D0 (pt) * | 1971-04-05 | 1973-06-14 | Ibm | Processos e disposicoes de circuito para decodificacao digital de sinais de frequencia codificada |
| DE2156123C2 (de) * | 1971-11-11 | 1978-11-30 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen |
| FR2207626A6 (US06235095-20010522-C00021.png) * | 1972-10-25 | 1974-06-14 | Ibm France | |
| US3818358A (en) * | 1972-12-29 | 1974-06-18 | Stromberg Carlson Corp | Noise rejection circuit for digital systems |
| DE2334426A1 (de) * | 1973-07-06 | 1975-01-23 | Telefonbau & Normalzeit Gmbh | Auswerter fuer sprachgeschuetzte frequenzselektive zeichenempfaenger nach dem mehrfrequenzverfahren |
-
1974
- 1974-09-12 US US05/505,204 patent/US3936801A/en not_active Expired - Lifetime
-
1975
- 1975-07-07 CA CA230,872A patent/CA1035879A/en not_active Expired
- 1975-09-03 SE SE7509780A patent/SE7509780L/xx unknown
- 1975-09-05 GB GB36740/75A patent/GB1520887A/en not_active Expired
- 1975-09-06 DE DE2539804A patent/DE2539804C3/de not_active Expired
- 1975-09-08 BE BE159811A patent/BE833155A/xx not_active IP Right Cessation
- 1975-09-11 IT IT69269/75A patent/IT1047999B/it active
- 1975-09-11 NL NLAANVRAGE7510708,A patent/NL177877C/xx not_active IP Right Cessation
- 1975-09-11 FR FR7527912A patent/FR2285038A1/fr active Granted
- 1975-09-11 CH CH1177575A patent/CH600684A5/xx not_active IP Right Cessation
- 1975-09-12 JP JP11084675A patent/JPS5535037B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2539804B2 (de) | 1979-09-13 |
| JPS5154707A (US06235095-20010522-C00021.png) | 1976-05-14 |
| FR2285038B1 (US06235095-20010522-C00021.png) | 1980-05-16 |
| CA1035879A (en) | 1978-08-01 |
| SE7509780L (sv) | 1976-03-15 |
| FR2285038A1 (fr) | 1976-04-09 |
| NL177877C (nl) | 1985-12-02 |
| JPS5535037B2 (US06235095-20010522-C00021.png) | 1980-09-11 |
| DE2539804A1 (de) | 1976-04-01 |
| IT1047999B (it) | 1980-10-20 |
| GB1520887A (en) | 1978-08-09 |
| DE2539804C3 (de) | 1983-02-10 |
| BE833155A (fr) | 1975-12-31 |
| US3936801A (en) | 1976-02-03 |
| NL7510708A (nl) | 1976-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |