NL7201712A - - Google Patents
Info
- Publication number
- NL7201712A NL7201712A NL7201712A NL7201712A NL7201712A NL 7201712 A NL7201712 A NL 7201712A NL 7201712 A NL7201712 A NL 7201712A NL 7201712 A NL7201712 A NL 7201712A NL 7201712 A NL7201712 A NL 7201712A
- Authority
- NL
- Netherlands
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)
- Circuits Of Receivers In General (AREA)
- Electric Clocks (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712156123 DE2156123C2 (de) | 1971-11-11 | 1971-11-11 | Frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7201712A true NL7201712A (OSRAM) | 1973-05-15 |
Family
ID=5824856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7201712A NL7201712A (OSRAM) | 1971-11-11 | 1972-02-09 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2156123C2 (OSRAM) |
| NL (1) | NL7201712A (OSRAM) |
Families Citing this family (2)
| 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 |
| 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 |
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1971
- 1971-11-11 DE DE19712156123 patent/DE2156123C2/de not_active Expired
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1972
- 1972-02-09 NL NL7201712A patent/NL7201712A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2156123A1 (OSRAM) | 1972-10-05 |
| DE2156123C2 (de) | 1978-11-30 |
| DE2156123B2 (de) | 1972-10-05 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BI | The patent application has been withdrawn |