IT1131453B - Amplificatore per l'impiego in un circuito di linea telefonica - Google Patents
Amplificatore per l'impiego in un circuito di linea telefonicaInfo
- Publication number
- IT1131453B IT1131453B IT21868/80A IT2186880A IT1131453B IT 1131453 B IT1131453 B IT 1131453B IT 21868/80 A IT21868/80 A IT 21868/80A IT 2186880 A IT2186880 A IT 2186880A IT 1131453 B IT1131453 B IT 1131453B
- Authority
- IT
- Italy
- Prior art keywords
- amplifier
- telephone line
- line circuit
- circuit
- telephone
- Prior art date
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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7903663A NL7903663A (nl) | 1979-05-10 | 1979-05-10 | Versterker voor toepassing in een lijncircuit. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8021868A0 IT8021868A0 (it) | 1980-05-07 |
IT1131453B true IT1131453B (it) | 1986-06-25 |
Family
ID=19833138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT21868/80A IT1131453B (it) | 1979-05-10 | 1980-05-07 | Amplificatore per l'impiego in un circuito di linea telefonica |
Country Status (11)
Country | Link |
---|---|
US (1) | US4340869A (it) |
JP (1) | JPS55151852A (it) |
AU (1) | AU543026B2 (it) |
BE (1) | BE883194A (it) |
CA (1) | CA1151331A (it) |
DE (1) | DE3017566C2 (it) |
FR (1) | FR2456431A1 (it) |
GB (1) | GB2050762B (it) |
IT (1) | IT1131453B (it) |
NL (1) | NL7903663A (it) |
SE (2) | SE446798B (it) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2135854B (en) * | 1983-02-10 | 1986-04-23 | Robert James Redding | Line-powered modem |
NL8403549A (nl) * | 1984-11-22 | 1986-06-16 | Philips Nv | Versterkerschakeling. |
FR2637752A1 (fr) * | 1988-10-07 | 1990-04-13 | Radiotechnique Compelec | Dispositif de limitation de courant de ligne pour terminal telephonique |
SE507740C2 (sv) | 1996-11-08 | 1998-07-06 | Ericsson Telefon Ab L M | Förfarande och anordning för avledning av effekt |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260955A (en) * | 1959-02-02 | 1966-07-12 | Franklin F Offner | Differential amplifier |
DE2159095C3 (de) * | 1971-11-29 | 1985-01-24 | Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | In der Verstärkung einstellbarer mehrstufiger Verstärker mit niederohmigem Eingangs- und Ausgangswiderstand |
US3896393A (en) * | 1973-12-26 | 1975-07-22 | Motorola Inc | Monolithic power amplifier capable of operating class a and class ab |
CH586983A5 (it) * | 1974-12-23 | 1977-04-15 | Ibm | |
US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
FR2371840A1 (fr) * | 1976-10-04 | 1978-06-16 | Ibm France | Circuit d'interface |
GB1527293A (en) * | 1977-04-21 | 1978-10-04 | Garwell K | Composite collector load for class a semiconductor amplifier |
US4211896A (en) * | 1977-10-17 | 1980-07-08 | Telecommunications Radioelectrique Et Telephoniques T.R.T. | Subscriber's circuit with a symmetrical amplifier |
FR2406357A1 (fr) * | 1977-10-17 | 1979-05-11 | Trt Telecom Radio Electr | Joncteur d'abonne telephonique |
US4268798A (en) * | 1977-12-19 | 1981-05-19 | Motorola, Inc. | High performance summing amplifier |
-
1979
- 1979-05-10 NL NL7903663A patent/NL7903663A/nl not_active Application Discontinuation
-
1980
- 1980-04-21 US US06/142,274 patent/US4340869A/en not_active Expired - Lifetime
- 1980-05-02 GB GB8014760A patent/GB2050762B/en not_active Expired
- 1980-05-06 AU AU58118/80A patent/AU543026B2/en not_active Ceased
- 1980-05-07 SE SE8003419A patent/SE446798B/sv not_active IP Right Cessation
- 1980-05-07 SE SE8003419D patent/SE8003419L/xx not_active Application Discontinuation
- 1980-05-07 IT IT21868/80A patent/IT1131453B/it active
- 1980-05-07 CA CA000351418A patent/CA1151331A/en not_active Expired
- 1980-05-08 BE BE0/200535A patent/BE883194A/fr not_active IP Right Cessation
- 1980-05-08 DE DE3017566A patent/DE3017566C2/de not_active Expired
- 1980-05-08 JP JP6006180A patent/JPS55151852A/ja active Granted
- 1980-05-09 FR FR8010453A patent/FR2456431A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3017566A1 (de) | 1980-11-13 |
AU5811880A (en) | 1980-11-13 |
JPS6333755B2 (it) | 1988-07-06 |
FR2456431A1 (fr) | 1980-12-05 |
GB2050762B (en) | 1983-03-16 |
IT8021868A0 (it) | 1980-05-07 |
SE446798B (sv) | 1986-10-06 |
DE3017566C2 (de) | 1985-10-10 |
AU543026B2 (en) | 1985-03-28 |
GB2050762A (en) | 1981-01-07 |
BE883194A (fr) | 1980-11-10 |
JPS55151852A (en) | 1980-11-26 |
SE8003419L (sv) | 1980-11-11 |
US4340869A (en) | 1982-07-20 |
FR2456431B1 (it) | 1984-12-28 |
NL7903663A (nl) | 1980-11-12 |
CA1151331A (en) | 1983-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950531 |