BE435593A - - Google Patents
Info
- Publication number
- BE435593A BE435593A BE435593DA BE435593A BE 435593 A BE435593 A BE 435593A BE 435593D A BE435593D A BE 435593DA BE 435593 A BE435593 A BE 435593A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
- H04J1/045—Filters applied to frequency transposition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
- H04J1/085—Terminal station; Combined modulator and demodulator circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL95240D DE733974C (de) | 1938-07-26 | 1938-07-26 | Traegerfrequenz-UEbertragungsanlage mit Mehrstufenmodulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE435593A true BE435593A (en:Method) | 1939-08-31 |
Family
ID=5827296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE435593D BE435593A (en:Method) | 1938-07-26 | 1939-07-24 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2276132A (en:Method) |
| BE (1) | BE435593A (en:Method) |
| CH (1) | CH216072A (en:Method) |
| DE (1) | DE733974C (en:Method) |
| FR (1) | FR858181A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL93838C (en:Method) * | 1953-02-18 | |||
| US4996709A (en) * | 1988-05-12 | 1991-02-26 | Tandy Corporation | Intercom telephone |
-
1938
- 1938-07-26 DE DEL95240D patent/DE733974C/de not_active Expired
-
1939
- 1939-07-19 US US285238A patent/US2276132A/en not_active Expired - Lifetime
- 1939-07-21 CH CH216072D patent/CH216072A/de unknown
- 1939-07-22 FR FR858181D patent/FR858181A/fr not_active Expired
- 1939-07-24 BE BE435593D patent/BE435593A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH216072A (de) | 1941-07-31 |
| FR858181A (fr) | 1940-11-19 |
| DE733974C (de) | 1943-04-06 |
| US2276132A (en) | 1942-03-10 |