BE432671A - - Google Patents
Info
- Publication number
- BE432671A BE432671A BE432671DA BE432671A BE 432671 A BE432671 A BE 432671A BE 432671D A BE432671D A BE 432671DA BE 432671 A BE432671 A BE 432671A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
-
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL0094222 | 1938-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE432671A true BE432671A (es) |
Family
ID=7287832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE432671D BE432671A (es) | 1938-02-12 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2290909A (es) |
| BE (1) | BE432671A (es) |
| CH (1) | CH208452A (es) |
| FR (1) | FR850207A (es) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2768274A (en) * | 1953-10-27 | 1956-10-23 | Gen Electric | Variable resistor control system |
| US3389386A (en) * | 1964-09-30 | 1968-06-18 | Technical Marketing Associates | Rellable monitoring system |
-
0
- BE BE432671D patent/BE432671A/xx unknown
-
1939
- 1939-02-10 CH CH208452D patent/CH208452A/de unknown
- 1939-02-11 FR FR850207D patent/FR850207A/fr not_active Expired
- 1939-04-21 US US269101A patent/US2290909A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR850207A (fr) | 1939-12-11 |
| US2290909A (en) | 1942-07-28 |
| CH208452A (de) | 1940-01-31 |