NL259976A - - Google Patents
Info
- Publication number
- NL259976A NL259976A NL259976DA NL259976A NL 259976 A NL259976 A NL 259976A NL 259976D A NL259976D A NL 259976DA NL 259976 A NL259976 A NL 259976A
- 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
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL259976 | 1961-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL259976A true NL259976A (de) |
Family
ID=19752806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL259976D NL259976A (de) | 1961-01-12 |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH400242A (de) |
| DE (1) | DE1165098B (de) |
| DK (1) | DK103613C (de) |
| GB (1) | GB921347A (de) |
| NL (1) | NL259976A (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214743B (de) * | 1963-02-23 | 1966-04-21 | Tekade Fernmeldeapp Ges Mit Be | Schaltungsanordnung zur Auswertung von Mehrfrequenz-Kodezeichen in Fernmelde-, insbesondere Fernsprechanlagen |
| US3226653A (en) * | 1963-05-07 | 1965-12-28 | Ampex | Automatic gain control circuit employing variable attenuation balanced diode bridge |
-
0
- NL NL259976D patent/NL259976A/xx unknown
-
1962
- 1962-01-09 GB GB80962A patent/GB921347A/en not_active Expired
- 1962-01-09 DK DK10362A patent/DK103613C/da active
- 1962-01-09 CH CH19462A patent/CH400242A/de unknown
- 1962-01-09 DE DEN21040A patent/DE1165098B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB921347A (en) | 1963-03-20 |
| CH400242A (de) | 1965-10-15 |
| DE1165098B (de) | 1964-03-12 |
| DK103613C (da) | 1966-01-31 |