FI85930B - Abonnentanslutning i en telefonanlaeggning. - Google Patents
Abonnentanslutning i en telefonanlaeggning. Download PDFInfo
- Publication number
- FI85930B FI85930B FI872277A FI872277A FI85930B FI 85930 B FI85930 B FI 85930B FI 872277 A FI872277 A FI 872277A FI 872277 A FI872277 A FI 872277A FI 85930 B FI85930 B FI 85930B
- Authority
- FI
- Finland
- Prior art keywords
- subscriber
- branches
- compensation
- input
- amplifier
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008054 signal transmission Effects 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/583—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using a bridge network
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
Claims (2)
1. Abonnentanslutningskrets i en telefonanläggning med aktiva kretselement med kapacitivt komplex ingängsimpe-dans, i vilken den frän telefonanläggningen till en abonnent sända signalen är förstärkt i tvä i mottakt arbe-tande operationsförstärkare och är inmatad i abonnentslin-gan via tvä koppiingsgrenar, som vardera innehäller en kondensator i serie med ett motständ, vilken abonnentslin-ga är matad med likström via tvä matningsmotständ, under det att den symmetriska signalen frän abonnenten är förd till en abonnentförstärkare via tvä grenar i en kompensa-tionskrets, som är avpassad för riktningsseparering av signalerna för de bäda talriktningarna, kännetecknad av att de för inmatning av den utsända lägfrekvenssignalen och för likströmsavkoppling i förhällande tili operations-förstärkarna (VI, V'l) anordnade kopplingsgrenarna (Rl, Cl eller Zl; R'l, C'l eller Z'l) tillsammans med dels tvä kopplingsmotständ (W, W) och dels tvä av var sin RC-krets (R2, C2; R'2, C'2) bestäende kompenseringsimpedanser (Z2, Z'2) bildar en kompensationsbrygga, varvid den symmetriska abonnentsignalen är tillförd tili abonnentförstärkaren (V2) via koppiingsmotständen (W, W).
2. Abonnentanslutningskrets enligt patentkravet 1 med enligt definitionen anpassade lika ingängs- och efterbild-ningsimpedanser, kännetecknad av att kompensationsnätet är sä omformat genom transformation av impedanserna, att dess vid mottagning av abonnentsignaler använda grenar (W, W) innehäller rent resistiva motständ, medan dess för kompensation avsedda grenar (Z2, Z'2) är bildade av var sin enkel seriekoppling av ett motständ och en kondensator - (R2, Z2; R'2, Z'2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0138086A AT386307B (de) | 1986-05-23 | 1986-05-23 | Fernsprechteilnehmerschaltung |
| AT138086 | 1986-05-23 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI872277A0 FI872277A0 (fi) | 1987-05-22 |
| FI872277A FI872277A (fi) | 1987-11-24 |
| FI85930B true FI85930B (fi) | 1992-02-28 |
| FI85930C FI85930C (sv) | 1992-06-10 |
Family
ID=3512628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI872277A FI85930C (sv) | 1986-05-23 | 1987-05-22 | Abonnentanslutning i en telefonanläggning |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4914693A (sv) |
| EP (1) | EP0246546B1 (sv) |
| AR (1) | AR241564A1 (sv) |
| AT (2) | AT386307B (sv) |
| BR (1) | BR8702641A (sv) |
| DE (1) | DE3770335D1 (sv) |
| DK (1) | DK257187A (sv) |
| FI (1) | FI85930C (sv) |
| PT (1) | PT84929B (sv) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642593B1 (fr) * | 1989-01-31 | 1991-04-12 | Cit Alcatel | Dispositif electronique de raccordement de ligne d'abonne |
| US4922531A (en) * | 1989-04-19 | 1990-05-01 | Northern Telecom Limited | Line interface circuit |
| DE3942758A1 (de) * | 1989-12-23 | 1991-06-27 | Standard Elektrik Lorenz Ag | Nachbildung einer komplexen impedanz und schnittstelle mit einer solchen nachbildung |
| DE3942757A1 (de) * | 1989-12-23 | 1991-06-27 | Standard Elektrik Lorenz Ag | Summierverstaerker mit einem komplexen gewichtungsfaktor und schnittstelle mit einem solchen summierverstaerker |
| JP2999214B2 (ja) * | 1990-03-02 | 2000-01-17 | 株式会社東芝 | 伝送入出力回路 |
| DE69024947T2 (de) * | 1990-05-11 | 1996-08-08 | Alcatel Nv | Impedanz-Synthese durch vielfache Schleife, die filternde Mittel verwendet |
| US5333192A (en) * | 1990-06-26 | 1994-07-26 | Northern Telecom Limited | Line interface circuit |
| US5202919A (en) * | 1990-09-04 | 1993-04-13 | Tollgrade Communications, Inc. | Metallic channel unit network |
| US5586181A (en) * | 1990-09-04 | 1996-12-17 | Tollgrade Communications, Inc. | Metallic channel unit network |
| US5457743A (en) * | 1990-09-04 | 1995-10-10 | Tollgrade Communications, Inc. | Metallic channel unit network |
| US5602912A (en) * | 1994-05-16 | 1997-02-11 | Silicon Systems, Inc. | Telephone hybrid circuit |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE152178C (sv) * | ||||
| GB1257878A (sv) * | 1970-04-10 | 1971-12-22 | ||
| FR2160308B1 (sv) * | 1971-11-19 | 1977-01-28 | Labo Cent Telecommunicat | |
| US4053722A (en) * | 1976-10-04 | 1977-10-11 | The United States Of America As Represented By The Secretary Of The Navy | Solid state two-wire/four-wire converter with common battery |
| NL7810086A (nl) * | 1978-10-06 | 1980-04-09 | Philips Nv | Voedingsbrug voor een abonneestroomloop. |
| US4283604A (en) * | 1979-06-04 | 1981-08-11 | Tellabs, Inc. | Current source circuits with common mode noise rejection |
| FR2478908B1 (sv) * | 1980-03-21 | 1984-08-03 | Thomson Csf Mat Tel | |
| US4387273A (en) * | 1980-08-25 | 1983-06-07 | International Telephone And Telegraph Corporation | Subscriber line interface circuit with impedance synthesizer |
| CA1154185A (en) * | 1981-01-23 | 1983-09-20 | Patrick R. Beirne | Subscriber line interface circuit |
| CA1200335A (en) * | 1984-02-13 | 1986-02-04 | Stanley D. Rosenbaum | Active impedance line feed circuit |
| JPS61244191A (ja) * | 1985-04-22 | 1986-10-30 | Nec Corp | 加入者回路 |
-
1986
- 1986-05-23 AT AT0138086A patent/AT386307B/de not_active IP Right Cessation
-
1987
- 1987-04-09 AR AR87307256A patent/AR241564A1/es active
- 1987-05-12 EP EP87106878A patent/EP0246546B1/de not_active Expired - Lifetime
- 1987-05-12 DE DE8787106878T patent/DE3770335D1/de not_active Expired - Fee Related
- 1987-05-12 AT AT87106878T patent/ATE64052T1/de not_active IP Right Cessation
- 1987-05-18 US US07/051,441 patent/US4914693A/en not_active Expired - Fee Related
- 1987-05-21 PT PT84929A patent/PT84929B/pt not_active IP Right Cessation
- 1987-05-21 DK DK257187A patent/DK257187A/da unknown
- 1987-05-22 BR BR8702641A patent/BR8702641A/pt not_active IP Right Cessation
- 1987-05-22 FI FI872277A patent/FI85930C/sv not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| PT84929B (pt) | 1990-02-08 |
| FI872277A0 (fi) | 1987-05-22 |
| AR241564A1 (es) | 1992-08-31 |
| DK257187D0 (da) | 1987-05-21 |
| BR8702641A (pt) | 1988-02-23 |
| DK257187A (da) | 1987-11-24 |
| EP0246546A1 (de) | 1987-11-25 |
| DE3770335D1 (de) | 1991-07-04 |
| EP0246546B1 (de) | 1991-05-29 |
| AT386307B (de) | 1988-08-10 |
| US4914693A (en) | 1990-04-03 |
| ATA138086A (de) | 1987-12-15 |
| FI85930C (sv) | 1992-06-10 |
| ATE64052T1 (de) | 1991-06-15 |
| PT84929A (de) | 1987-06-01 |
| FI872277A (fi) | 1987-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed | ||
| MM | Patent lapsed |
Owner name: SIEMENS AKTIENGESELLSCHAFT |