FR725607A - Improvements to electrical signaling systems - Google Patents
Improvements to electrical signaling systemsInfo
- Publication number
- FR725607A FR725607A FR725607DA FR725607A FR 725607 A FR725607 A FR 725607A FR 725607D A FR725607D A FR 725607DA FR 725607 A FR725607 A FR 725607A
- Authority
- FR
- France
- Prior art keywords
- signaling systems
- electrical signaling
- electrical
- systems
- signaling
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/10—Intermediate station arrangements, e.g. for branching, for tapping-off
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/36—Repeater circuits
- H04B3/38—Repeater circuits for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Coils Or Transformers For Communication (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US480836A US1836804A (en) | 1930-09-10 | 1930-09-10 | Carrier repeating system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR725607A true FR725607A (en) | 1932-05-14 |
Family
ID=23909542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR725607D Expired FR725607A (en) | 1930-09-10 | 1931-09-08 | Improvements to electrical signaling systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US1836804A (en) |
DE (1) | DE607671C (en) |
FR (1) | FR725607A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317216A (en) * | 1980-05-09 | 1982-02-23 | Tx Rx Systems, Inc. | Bi-directional filter system for amplifying signals in separate frequency bands |
-
1930
- 1930-09-10 US US480836A patent/US1836804A/en not_active Expired - Lifetime
-
1931
- 1931-09-08 FR FR725607D patent/FR725607A/en not_active Expired
- 1931-10-16 DE DEI42818D patent/DE607671C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE607671C (en) | 1935-01-04 |
US1836804A (en) | 1931-12-15 |
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