CA1074033A - Resistive battery feed for line circuits - Google Patents
Resistive battery feed for line circuitsInfo
- Publication number
- CA1074033A CA1074033A CA270,111A CA270111A CA1074033A CA 1074033 A CA1074033 A CA 1074033A CA 270111 A CA270111 A CA 270111A CA 1074033 A CA1074033 A CA 1074033A
- Authority
- CA
- Canada
- Prior art keywords
- line
- impedance
- battery feed
- impedances
- value
- 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
- 239000004020 conductor Substances 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000010396 two-hybrid screening Methods 0.000 description 1
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/656,189 US3993880A (en) | 1976-02-09 | 1976-02-09 | Resistive battery feed for line circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1074033A true CA1074033A (en) | 1980-03-18 |
Family
ID=24632022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA270,111A Expired CA1074033A (en) | 1976-02-09 | 1977-01-20 | Resistive battery feed for line circuits |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3993880A (cg-RX-API-DMAC7.html) |
| JP (1) | JPS5936467B2 (cg-RX-API-DMAC7.html) |
| CA (1) | CA1074033A (cg-RX-API-DMAC7.html) |
| DE (1) | DE2705277C3 (cg-RX-API-DMAC7.html) |
| FR (1) | FR2340652A1 (cg-RX-API-DMAC7.html) |
| GB (1) | GB1562934A (cg-RX-API-DMAC7.html) |
| IT (1) | IT1073392B (cg-RX-API-DMAC7.html) |
| SE (1) | SE7701041L (cg-RX-API-DMAC7.html) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197431A (en) * | 1978-10-02 | 1980-04-08 | Digital Telephone Systems, Inc. | Subscriber loop feed apparatus |
| FR2462006A1 (fr) * | 1979-07-20 | 1981-02-06 | Ibm France | Dispositif pour augmenter l'inductance parallele d'un transformateur |
| JPS6225009Y2 (cg-RX-API-DMAC7.html) * | 1979-12-28 | 1987-06-26 | ||
| US4554412A (en) * | 1984-07-23 | 1985-11-19 | At&T Information Systems Inc. | Resistive line circuit |
| CA1240088A (en) * | 1985-11-20 | 1988-08-02 | Mitel Corporation | Solid state trunk circuit |
| DE3640127A1 (de) * | 1986-11-25 | 1988-06-01 | Standard Elektrik Lorenz Ag | Elektronische gabelschaltung |
| US4813066A (en) * | 1987-07-13 | 1989-03-14 | American Telephone And Telegraph Company, At&T Information Systems | Battery feed circuit for a telephone system |
| US4899382A (en) * | 1988-06-15 | 1990-02-06 | Siemens Transmission Systems, Inc. | Telephone circuit using DC blocked transformer and negative impedance technique |
| JP2912388B2 (ja) * | 1989-08-15 | 1999-06-28 | 沖電気工業株式会社 | 加入者回路 |
| EP0446944A3 (en) * | 1990-03-16 | 1991-12-27 | Fujitsu Limited | Feed circuit in exchanger |
| JPH0515056A (ja) * | 1991-07-04 | 1993-01-22 | Fujitsu Ltd | 伝送装置における外部異常電圧保護方式 |
| US5659610A (en) * | 1994-09-28 | 1997-08-19 | Lucent Technologies Inc. | Battery feed circuit |
| US6853526B1 (en) * | 2000-09-22 | 2005-02-08 | Anadigics, Inc. | Transient overvoltage protection circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2694184A (en) * | 1951-03-16 | 1954-11-09 | Bell Telephone Labor Inc | Equalizer |
| NL264885A (cg-RX-API-DMAC7.html) * | 1961-05-18 | |||
| DE1243728B (de) * | 1962-12-19 | 1967-07-06 | Standard Elektrik Lorenz Ag | Schaltungsanordnung fuer eine Transistor-Trennstufe mit vorgegebenem, auch bei veraenderlichem Lastwiderstand konstant bleibendem Eingangswiderstand und konstanter Spannungsdaempfung |
| US3309608A (en) * | 1963-10-22 | 1967-03-14 | Alford Andrew | High frequency techniques for measuring reflected energy |
| US3288937A (en) * | 1963-11-26 | 1966-11-29 | Automatic Elect Lab | Diode switched pad circuit |
| US3497619A (en) * | 1967-10-06 | 1970-02-24 | Us Navy | Digital data transmission system |
| JPS5610829B2 (cg-RX-API-DMAC7.html) * | 1973-03-30 | 1981-03-10 |
-
1976
- 1976-02-09 US US05/656,189 patent/US3993880A/en not_active Expired - Lifetime
-
1977
- 1977-01-20 CA CA270,111A patent/CA1074033A/en not_active Expired
- 1977-02-01 SE SE7701041A patent/SE7701041L/ not_active Application Discontinuation
- 1977-02-04 FR FR7703158A patent/FR2340652A1/fr active Granted
- 1977-02-07 GB GB4867/77A patent/GB1562934A/en not_active Expired
- 1977-02-08 JP JP52012197A patent/JPS5936467B2/ja not_active Expired
- 1977-02-08 IT IT67284/77A patent/IT1073392B/it active
- 1977-02-09 DE DE2705277A patent/DE2705277C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1073392B (it) | 1985-04-17 |
| US3993880A (en) | 1976-11-23 |
| SE7701041L (sv) | 1977-08-10 |
| FR2340652A1 (fr) | 1977-09-02 |
| DE2705277B2 (de) | 1979-03-01 |
| FR2340652B1 (cg-RX-API-DMAC7.html) | 1980-12-12 |
| GB1562934A (en) | 1980-03-19 |
| DE2705277A1 (de) | 1977-08-18 |
| JPS5296808A (en) | 1977-08-15 |
| DE2705277C3 (de) | 1979-10-18 |
| JPS5936467B2 (ja) | 1984-09-04 |
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| Publication | Publication Date | Title |
|---|---|---|
| CA1074033A (en) | Resistive battery feed for line circuits | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |