NL7909147A - Longitudinale balansinrichting voor tweedraads/vier- draads-lijncircuits voor telecommunicatiedoeleinden. - Google Patents
Longitudinale balansinrichting voor tweedraads/vier- draads-lijncircuits voor telecommunicatiedoeleinden. Download PDFInfo
- Publication number
- NL7909147A NL7909147A NL7909147A NL7909147A NL7909147A NL 7909147 A NL7909147 A NL 7909147A NL 7909147 A NL7909147 A NL 7909147A NL 7909147 A NL7909147 A NL 7909147A NL 7909147 A NL7909147 A NL 7909147A
- Authority
- NL
- Netherlands
- Prior art keywords
- line
- wire
- current supply
- circuit
- supply resistors
- Prior art date
Links
- 238000000151 deposition Methods 0.000 claims description 2
- 230000001010 compromised effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- 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
- H04B1/581—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 transformer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7850385A GB2041700B (en) | 1978-12-30 | 1978-12-30 | Balance on 2-4 wire hybrid circuits |
| GB7850385 | 1978-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7909147A true NL7909147A (nl) | 1980-07-02 |
Family
ID=10502017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7909147A NL7909147A (nl) | 1978-12-30 | 1979-12-19 | Longitudinale balansinrichting voor tweedraads/vier- draads-lijncircuits voor telecommunicatiedoeleinden. |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4289939A (enExample) |
| JP (1) | JPS5593331A (enExample) |
| BR (1) | BR7907893A (enExample) |
| CA (1) | CA1131821A (enExample) |
| DE (1) | DE2952353A1 (enExample) |
| FR (1) | FR2445673A1 (enExample) |
| GB (1) | GB2041700B (enExample) |
| IE (1) | IE48923B1 (enExample) |
| NL (1) | NL7909147A (enExample) |
| NZ (1) | NZ192463A (enExample) |
| SE (1) | SE437099B (enExample) |
| ZA (1) | ZA796286B (enExample) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4577255A (en) * | 1984-06-20 | 1986-03-18 | Itt Corporation | Lightning protection circuit for digital subscriber loop interface |
| US4757528A (en) * | 1986-09-05 | 1988-07-12 | Harris Corporation | Thermally coupled information transmission across electrical isolation boundaries |
| USD776637S1 (en) * | 2014-09-22 | 2017-01-17 | Ching-Wen Chen | Earhook microphone |
| USD843347S1 (en) | 2016-10-18 | 2019-03-19 | Samson Technologies Corp. | Head-worn microphone |
| US11309709B2 (en) | 2018-07-18 | 2022-04-19 | Mitsubishi Electric Corporation | High-frequency current compensator and air-conditioning system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL269763A (enExample) * | 1960-09-30 | |||
| DE1126941B (de) * | 1960-09-30 | 1962-04-05 | Siemens Ag | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
| US4132863A (en) * | 1977-12-20 | 1979-01-02 | Bell Telephone Laboratories, Incorporated | Automatic gain and return loss compensating line circuit |
-
1978
- 1978-12-30 GB GB7850385A patent/GB2041700B/en not_active Expired
-
1979
- 1979-11-20 ZA ZA00796286A patent/ZA796286B/xx unknown
- 1979-11-27 CA CA340,721A patent/CA1131821A/en not_active Expired
- 1979-12-04 BR BR7907893A patent/BR7907893A/pt unknown
- 1979-12-19 NZ NZ192463A patent/NZ192463A/xx unknown
- 1979-12-19 NL NL7909147A patent/NL7909147A/nl not_active Application Discontinuation
- 1979-12-24 DE DE19792952353 patent/DE2952353A1/de active Granted
- 1979-12-24 FR FR7931596A patent/FR2445673A1/fr not_active Withdrawn
- 1979-12-27 JP JP17396779A patent/JPS5593331A/ja active Granted
- 1979-12-27 SE SE7910671A patent/SE437099B/sv not_active IP Right Cessation
- 1979-12-28 IE IE2529/79A patent/IE48923B1/en unknown
- 1979-12-28 US US06/108,179 patent/US4289939A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IE792529L (en) | 1980-06-30 |
| JPS6237852B2 (enExample) | 1987-08-14 |
| GB2041700A (en) | 1980-09-10 |
| ZA796286B (en) | 1980-11-26 |
| FR2445673A1 (fr) | 1980-07-25 |
| CA1131821A (en) | 1982-09-14 |
| NZ192463A (en) | 1982-05-25 |
| IE48923B1 (en) | 1985-06-12 |
| DE2952353C2 (enExample) | 1988-01-21 |
| SE437099B (sv) | 1985-02-04 |
| BR7907893A (pt) | 1980-07-29 |
| DE2952353A1 (de) | 1980-07-10 |
| GB2041700B (en) | 1982-12-08 |
| SE7910671L (sv) | 1980-07-01 |
| JPS5593331A (en) | 1980-07-15 |
| US4289939A (en) | 1981-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1154185A (en) | Subscriber line interface circuit | |
| KR870002736A (ko) | 가입자 선로 인터페이스 회로 | |
| NL7909147A (nl) | Longitudinale balansinrichting voor tweedraads/vier- draads-lijncircuits voor telecommunicatiedoeleinden. | |
| US3745261A (en) | Telephone set speech network | |
| GB1532889A (en) | Electronic telephone network | |
| GB2199719A (en) | Dc control unit | |
| SU1371514A3 (ru) | Бестрансформаторна дифференциальна система | |
| US4588858A (en) | Differential amplifiers and method of differentially driving a two-wire line circuit | |
| GR880100377A (el) | Συσκευη για την επιτευξη ελεγξιμης συνθετης αντιστασης γραμμης τερματισμου | |
| JPH0634490B2 (ja) | 電話機用送話信号抑制回路 | |
| US4674117A (en) | Subscriber line circuit having an improved offhook supervision circuit | |
| US3987254A (en) | Transformerless amplification circuitry for telecommunication system | |
| ES340855A1 (es) | Circuito vocal para aparatos telefonicos. | |
| US2645681A (en) | Telephone equalizer circuit | |
| US3135829A (en) | Conference call circuit | |
| US2167069A (en) | Transmission system | |
| US3227812A (en) | Communication channel-joining fork circuit | |
| US3592971A (en) | Equalizing and antisidetone telephone circuit | |
| US3147345A (en) | Gain selective telephone set | |
| FI811037L (fi) | Kopplingsanordning foer anslutning fraon telefonbestaellarens dubbelledningar till respektive ledning foer utgaoende och ankommande signaler | |
| JPS637691B2 (enExample) | ||
| JPS54136252A (en) | Two-to-four wire conversion circuit | |
| US592417A (en) | Mtlo g | |
| US3345467A (en) | Telephone systems and apparatus | |
| US592401A (en) | Milo g |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CNR | Transfer of rights (patent application after its laying open for public inspection) |
Free format text: PLESSEY OVERSEAS LIMITED |
|
| A85 | Still pending on 85-01-01 | ||
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| BV | The patent application has lapsed |