JPS57501155A - - Google Patents
Info
- Publication number
- JPS57501155A JPS57501155A JP56502549A JP50254981A JPS57501155A JP S57501155 A JPS57501155 A JP S57501155A JP 56502549 A JP56502549 A JP 56502549A JP 50254981 A JP50254981 A JP 50254981A JP S57501155 A JPS57501155 A JP S57501155A
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/175,551 US4358645A (en) | 1980-08-05 | 1980-08-05 | Loop sensing circuit for use with a subscriber loop interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57501155A true JPS57501155A (ja) | 1982-07-01 |
Family
ID=22640682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56502549A Pending JPS57501155A (ja) | 1980-08-05 | 1981-07-13 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4358645A (ja) |
| EP (1) | EP0056810A4 (ja) |
| JP (1) | JPS57501155A (ja) |
| BR (1) | BR8108728A (ja) |
| CA (1) | CA1157978A (ja) |
| IT (1) | IT1145461B (ja) |
| WO (1) | WO1982000554A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128992A (en) * | 1989-08-11 | 1992-07-07 | Fujitsu Limited | Hybrid circuit |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104336A (en) * | 1980-12-20 | 1982-06-29 | Oki Electric Ind Co Ltd | Hybrid circuit |
| US4706281A (en) * | 1984-04-30 | 1987-11-10 | American Telephone And Telegraph Company | Dynamic impedance element for a battery feed circuit |
| US4631362A (en) * | 1984-09-27 | 1986-12-23 | At&T Bell Laboratories | Low resistance origination scan circuit |
| IT1214603B (it) * | 1985-04-30 | 1990-01-18 | Ates Componenti Elettron | Circuito telefonico, integrabile monoliticamente, perl'alimentazione di una linea telefonica d'utente. |
| US6661892B1 (en) * | 1999-03-30 | 2003-12-09 | Agere Systems Inc. | Method and apparatus for decreasing distortion in a line powered modulator circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7208148A (ja) * | 1972-06-15 | 1973-12-18 | ||
| US4004109A (en) * | 1975-05-09 | 1977-01-18 | Boxall Frank S | Hybrid circuit |
| US4203012A (en) * | 1977-07-14 | 1980-05-13 | Boxall Frank S | Hybrid circuit using current mirror circuits |
-
1980
- 1980-08-05 US US06/175,551 patent/US4358645A/en not_active Expired - Lifetime
-
1981
- 1981-07-13 EP EP19810902132 patent/EP0056810A4/en not_active Withdrawn
- 1981-07-13 JP JP56502549A patent/JPS57501155A/ja active Pending
- 1981-07-13 BR BR8108728A patent/BR8108728A/pt unknown
- 1981-07-13 WO PCT/US1981/000942 patent/WO1982000554A1/en not_active Application Discontinuation
- 1981-07-15 CA CA000381771A patent/CA1157978A/en not_active Expired
- 1981-07-28 IT IT48993/81A patent/IT1145461B/it active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128992A (en) * | 1989-08-11 | 1992-07-07 | Fujitsu Limited | Hybrid circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8148993A0 (it) | 1981-07-28 |
| EP0056810A1 (en) | 1982-08-04 |
| BR8108728A (pt) | 1982-07-13 |
| EP0056810A4 (en) | 1983-03-17 |
| IT1145461B (it) | 1986-11-05 |
| WO1982000554A1 (en) | 1982-02-18 |
| US4358645A (en) | 1982-11-09 |
| CA1157978A (en) | 1983-11-29 |