IT8521729A0 - Circuito di linea a corrente costante. - Google Patents

Circuito di linea a corrente costante.

Info

Publication number: IT8521729A0
Authority: IT; Italy
Prior art keywords: constant current; current line; line circuit; circuit; constant
Prior art date: 1985-03-15

Application number

IT8521729A

Other languages

English (en)

Other versions

IT1185313B (it

Inventor

Rolf G Meier

John A Barsellotti

Original Assignee

Mitel Corp

Priority date (The priority date 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 date listed.)

1985-03-15

Filing date

1985-07-26

Publication date

1985-07-26

1985-07-26 Application filed by Mitel Corp filed Critical Mitel Corp

1985-07-26 Publication of IT8521729A0 publication Critical patent/IT8521729A0/it

1987-11-12 Application granted granted Critical

1987-11-12 Publication of IT1185313B publication Critical patent/IT1185313B/it

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)
Amplifiers (AREA)
Devices For Supply Of Signal Current (AREA)

IT21729/85A 1985-03-15 1985-07-26 Circuito di linea a corrente costante IT1185313B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA000476683A CA1231480A (en)	1985-03-15	1985-03-15	Constant current line circuit

Publications (2)

Publication Number	Publication Date
IT8521729A0 true IT8521729A0 (it)	1985-07-26
IT1185313B IT1185313B (it)	1987-11-12

Family

ID=4130040

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT21729/85A IT1185313B (it)	1985-03-15	1985-07-26	Circuito di linea a corrente costante

Country Status (8)

Country	Link
US (1)	US4723280A (it)
JP (1)	JPS61214655A (it)
CN (1)	CN1004961B (it)
CA (1)	CA1231480A (it)
DE (1)	DE3531260A1 (it)
FR (1)	FR2579048A1 (it)
GB (1)	GB2172472B (it)
IT (1)	IT1185313B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA1255026A (en) *	1986-12-24	1989-05-30	Mitel Corporation	Dc control circuit
CA1257027A (en) *	1987-03-10	1989-07-04	Rolf Meier	Compensation circuit for use with an integrating amplifier
JPH0671295B2 (ja) *	1987-04-06	1994-09-07	沖電気工業株式会社	加入者線給電回路
US5359655A (en) *	1991-06-06	1994-10-25	U.S. Philips Corporation	Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances
CN1067197C (zh) *	1994-06-22	2001-06-13	熊焰明	用户接口低内阻馈电装置
JP2845181B2 (ja) *	1995-09-22	1999-01-13	日本電気株式会社	加入者回路
GB2360906B (en) *	2000-03-31	2003-10-15	Mitel Corp	Constant current line circuit with class features

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1157175B (de)	1961-10-24	1963-11-14	Deutsche Erdoel Ag	Sicherheitskopfstueck zum Heben von Schwerstangen und Bohrgestaenge
CH599731A5 (it) *	1976-03-02	1978-05-31	Ibm
ZA784547B (en) *	1977-08-17	1979-08-29	Post Office	Unbalanced/balanced converter circuits
JPS5921237B2 (ja) *	1978-02-01	1984-05-18	ミテル・コ−ポレ−シヨン	電話ライン回路
US4278847A (en) *	1979-02-26	1981-07-14	Tii Corporation	Transformerless hybrid circuits
GB2055021B (en) *	1979-07-24	1983-03-30	Mitel Corp	Telephone line circuit
GB2065418B (en) *	1979-12-06	1984-02-15	Standard Telephones Cables Ltd	Telephone line feed
US4317963A (en) *	1980-09-22	1982-03-02	International Telephone And Telegraph Corporation	Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control
CA1154185A (en) *	1981-01-23	1983-09-20	Patrick R. Beirne	Subscriber line interface circuit
SE452385B (sv) *	1981-02-17	1987-11-23	Western Electric Co	Batterimatningskrets
CA1157175A (en) *	1981-02-20	1983-11-15	Mitel Corporation	Power saving line circuit
US4431868A (en) *	1981-07-09	1984-02-14	International Telephone And Telegraph Corporation	Solid state telephone line interface circuit with ringing capability
DE3138649A1 (de) *	1981-09-29	1983-04-14	TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg	Verfahren und schaltungsanordnung zur speisung einer teilnehmerendeinrichtung
CA1179078A (en) *	1982-06-04	1984-12-04	Stanley D. Rosenbaum	Active impedance line feed circuit
GB2132448B (en) *	1982-12-07	1986-03-12	Standard Telephones Cables Ltd	Telephone subscribers' line interface circuit
CA1182230A (en) *	1982-12-17	1985-02-05	Patrick R. Beirne	Subscriber line interface circuit
US4600811A (en) *	1982-12-28	1986-07-15	Nec Corporation	Subscriber line interface circuit
US4563547A (en) *	1983-03-07	1986-01-07	At&T Bell Laboratories	Loop-start/ground-start line interface circuit
CA1200938A (en) *	1983-09-30	1986-02-18	Mitel Corporation	Voice and data interface circuit
US4532381A (en) *	1984-02-13	1985-07-30	Northern Telecom Limited	Active impedance line feed circuit

1985
- 1985-03-15 CA CA000476683A patent/CA1231480A/en not_active Expired
- 1985-06-24 US US06/747,705 patent/US4723280A/en not_active Expired - Lifetime
- 1985-07-17 GB GB08518066A patent/GB2172472B/en not_active Expired
- 1985-07-26 IT IT21729/85A patent/IT1185313B/it active
- 1985-08-31 DE DE19853531260 patent/DE3531260A1/de active Granted
- 1985-09-04 JP JP60196842A patent/JPS61214655A/ja active Pending
- 1985-11-02 CN CN85108019.7A patent/CN1004961B/zh not_active Expired
- 1985-12-24 FR FR8519368A patent/FR2579048A1/fr not_active Withdrawn

Also Published As

Publication number	Publication date
CN85108019A (zh)	1986-09-10
GB2172472B (en)	1988-12-07
US4723280A (en)	1988-02-02
DE3531260A1 (de)	1986-09-18
GB2172472A (en)	1986-09-17
FR2579048A1 (fr)	1986-09-19
JPS61214655A (ja)	1986-09-24
CN1004961B (zh)	1989-08-02
GB8518066D0 (en)	1985-08-21
DE3531260C2 (it)	1990-01-11
IT1185313B (it)	1987-11-12
CA1231480A (en)	1988-01-12

Publication	Publication Date	Title
DE3670154D1 (de)	1990-05-10	Elektronisches hubodometer.
DE3686848D1 (de)	1992-11-05	Bildverbesserungsschaltung.
DE3679741D1 (de)	1991-07-18	Pseudoformatkamera.
FI870007L (fi)	1987-01-02	Inkontinensskydd jaemte saett foer dess framstaellning.
FI864996A (fi)	1987-07-01	Foerfarande foer att avlaegsna toxiska organiska aemnen ur deras svaga vattenloesningar.
DE3672748D1 (de)	1990-08-23	Spannungsmultipliziererschaltung.
DE3689755D1 (de)	1994-05-05	Kamera.
DE3674671D1 (de)	1990-11-08	Loetvorrichtung.
DE3681045D1 (de)	1991-10-02	Vorladungsschaltung.
IT8522983A0 (it)	1985-11-26	Circuito di stato di linea telefonica.
FI864612L (fi)	1987-05-14	Anordning foer att avlaegsna luftinneslutningar ur pappersstaplar.
FI862890A0 (fi)	1986-07-09	Elektrisk klaemlist.
DE3673816D1 (de)	1990-10-04	Schnittstellenschaltung.
DE3575500D1 (de)	1990-02-22	Durchfuehrungsklemmenanordnung.
IT8620618A0 (it)	1986-05-30	Circuito di collegamento.
IT8622720A0 (it)	1986-12-17	Circuito limitatore di tensione.
NO855278L (no)	1986-10-27	Elektrisk forbindelse.
IT8521729A0 (it)	1985-07-26	Circuito di linea a corrente costante.
NL193232B (nl)	1998-11-02	Elektronisch samenstel.
DE3668522D1 (de)	1990-03-01	Elektronischer schalter.
NL194100B (nl)	2001-02-01	Referentiespanningsopwekschakeling.
IT8522808A0 (it)	1985-11-13	Circuito elettrico di comando.
IT8619722A0 (it)	1986-03-12	Disposizione circuitale.
DE3686565D1 (de)	1992-10-01	Dauertraeger-ueberwachungsschaltung.
FI864035L (fi)	1987-04-08	Elektrisk anslutning.

Legal Events

Date	Code	Title	Description
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19960731