DE2161979A1 - Nachrichten-Signalempfänger - Google Patents
Nachrichten-SignalempfängerInfo
- Publication number
- DE2161979A1 DE2161979A1 DE19712161979 DE2161979A DE2161979A1 DE 2161979 A1 DE2161979 A1 DE 2161979A1 DE 19712161979 DE19712161979 DE 19712161979 DE 2161979 A DE2161979 A DE 2161979A DE 2161979 A1 DE2161979 A1 DE 2161979A1
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- signal receiver
- signal
- filter
- message signal
- 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.)
- Pending
Links
- 238000005070 sampling Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- QBPPRVHXOZRESW-UHFFFAOYSA-N 1,4,7,10-tetraazacyclododecane Chemical compound C1CNCCNCCNCCN1 QBPPRVHXOZRESW-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
-
- 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)
- Signal Processing (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9942170A | 1970-12-18 | 1970-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2161979A1 true DE2161979A1 (de) | 1972-07-06 |
Family
ID=22274926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19712161979 Pending DE2161979A1 (de) | 1970-12-18 | 1971-12-14 | Nachrichten-Signalempfänger |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3692953A (OSRAM) |
| BE (1) | BE776664A (OSRAM) |
| CA (1) | CA953368A (OSRAM) |
| DE (1) | DE2161979A1 (OSRAM) |
| FR (1) | FR2118046B1 (OSRAM) |
| GB (1) | GB1354010A (OSRAM) |
| IT (1) | IT943299B (OSRAM) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6693957B1 (en) * | 1998-12-31 | 2004-02-17 | Nortel Networks Limited | Adaptive front end for discrete multitone modem |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223783A (en) * | 1960-05-09 | 1965-12-14 | Fuji Tsushinki Seizo Kk | Time-division multiplex voice-frequency discriminator |
| NL267564A (OSRAM) * | 1960-08-22 | |||
| US3296463A (en) * | 1963-10-21 | 1967-01-03 | Princeton Applied Res Corp | Frequency responsive network |
| US3288940A (en) * | 1963-10-24 | 1966-11-29 | Automatic Elect Lab | Multifrequency signal receiver |
| US3445606A (en) * | 1966-03-21 | 1969-05-20 | Stromberg Carlson Corp | Multifrequency detection system including a frequency multiplying circuit |
| FR1536854A (fr) * | 1966-09-17 | 1968-08-16 | Int Standard Electric Corp | Perfectionnements aux récepteurs de signaux électriques alternatifs |
-
1970
- 1970-12-18 US US99421A patent/US3692953A/en not_active Expired - Lifetime
-
1971
- 1971-08-04 CA CA119,784A patent/CA953368A/en not_active Expired
- 1971-12-13 FR FR7144633A patent/FR2118046B1/fr not_active Expired
- 1971-12-14 BE BE776664A patent/BE776664A/xx unknown
- 1971-12-14 DE DE19712161979 patent/DE2161979A1/de active Pending
- 1971-12-15 GB GB5821271A patent/GB1354010A/en not_active Expired
- 1971-12-17 IT IT71146/71A patent/IT943299B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| CA953368A (en) | 1974-08-20 |
| BE776664A (fr) | 1972-04-04 |
| FR2118046A1 (OSRAM) | 1972-07-28 |
| FR2118046B1 (OSRAM) | 1977-01-28 |
| GB1354010A (en) | 1974-06-05 |
| IT943299B (it) | 1973-04-02 |
| US3692953A (en) | 1972-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHN | Withdrawal |