BE497800A - - Google Patents
Info
- Publication number
- BE497800A BE497800A BE497800DA BE497800A BE 497800 A BE497800 A BE 497800A BE 497800D A BE497800D A BE 497800DA BE 497800 A BE497800 A BE 497800A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
- H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US113072A US2582498A (en) | 1949-08-30 | 1949-08-30 | Negative impedance repeater and loading system |
Publications (1)
Publication Number | Publication Date |
---|---|
BE497800A true BE497800A (ru) |
Family
ID=22347466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE497800D BE497800A (ru) | 1949-08-30 |
Country Status (6)
Country | Link |
---|---|
US (2) | US2582498A (ru) |
BE (1) | BE497800A (ru) |
CH (1) | CH294911A (ru) |
DE (1) | DE857649C (ru) |
FR (1) | FR1034587A (ru) |
GB (1) | GB678993A (ru) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069692B (ru) * | 1959-11-26 | |||
BE522796A (ru) * | 1952-09-17 | |||
BE518901A (ru) * | 1952-09-19 | |||
DE958573C (de) * | 1952-12-14 | 1957-02-21 | Rudolf Mehr | Schaltungsanordnung zur Daempfungsverminderung in Fernmeldeanlagen |
US2841647A (en) * | 1953-12-07 | 1958-07-01 | Gen Dynamics Corp | Privacy insuring means for intercommunication systems |
US2878325A (en) * | 1954-04-15 | 1959-03-17 | Bell Telephone Labor Inc | Negative impedance repeaters |
US2876298A (en) * | 1954-08-09 | 1959-03-03 | Sierra Electronic Corp | Electronic amplifier network |
CH366309A (it) * | 1955-08-10 | 1962-12-31 | S T I P E L Societa Telefonica | Dispositivo d'amplificazione ad impedenza negativa |
NL201492A (ru) * | 1955-10-25 | |||
US2904641A (en) * | 1955-11-29 | 1959-09-15 | Itt | Negative-impedance repeater using a transistor amplifier |
BE563338A (ru) * | 1956-12-19 | |||
US3068329A (en) * | 1959-04-28 | 1962-12-11 | Bell Telephone Labor Inc | Negative-impedance repeater |
US3024324A (en) * | 1960-04-27 | 1962-03-06 | Automatic Elect Lab | Negative impedance repeater |
US3303437A (en) * | 1964-11-16 | 1967-02-07 | Bell Telephone Labor Inc | Building-out network for non-loaded transmission lines |
US4942603A (en) * | 1987-11-04 | 1990-07-17 | Chambers Charles W | Methods and apparatus for providing reciprocal impedance conversion |
US5131028A (en) * | 1987-11-04 | 1992-07-14 | Chambers Charles W | Methods and apparatus for providing reciprocal impedance conversion |
US5249224A (en) * | 1987-11-04 | 1993-09-28 | Chambers Charles W | Methods and apparatus for providing reciprocal impedance conversion |
US4961218A (en) * | 1989-05-17 | 1990-10-02 | Tollgrade Communications, Inc. | Enhanced line powered amplifier |
WO2010007177A1 (en) * | 2008-07-17 | 2010-01-21 | Stichting Imec Nederland | Dual-loop feedback amplifying circuit |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2057998A (en) * | 1927-11-18 | 1936-10-20 | Telefunken Gmbh | Vacuum tube circuits |
FR690417A (fr) * | 1929-05-11 | 1930-09-19 | Telefunken Gmbh | Nouvelle impédance réglable et son procédé de réglage |
US1971919A (en) * | 1930-10-11 | 1934-08-28 | Rca Corp | Negative conductance circuits |
DE725468C (de) * | 1936-11-10 | 1942-09-23 | Sueddeutsche Telefon App Kabel | Anordnung zur Verringerung des Klirrfaktors |
US2220770A (en) * | 1937-01-30 | 1940-11-05 | Gen Electric | Apparatus for controlling the apparent resistance of an amplifier anode |
US2236690A (en) * | 1938-03-05 | 1941-04-01 | Bell Telephone Labor Inc | Negative impedance circuit |
US2274347A (en) * | 1938-04-14 | 1942-02-24 | Rca Corp | Negative resistance circuit arrangement |
GB515762A (en) * | 1938-06-11 | 1939-12-13 | Marconi Wireless Telegraph Co | Improvements in or relating to high frequency amplifier arrangements |
CH235160A (fr) * | 1938-06-21 | 1944-11-15 | Bell Telephone Mfg | Circuit électrique. |
GB516358A (en) * | 1938-06-21 | 1939-01-01 | Standard Telephones Cables Ltd | Stabilized negative resistance and conductance devices |
US2270644A (en) * | 1939-03-18 | 1942-01-20 | Bell Telephone Labor Inc | Negative impedance circuits |
US2232642A (en) * | 1939-12-13 | 1941-02-18 | Bell Telephone Labor Inc | Loading system |
NL63669C (ru) * | 1940-04-20 | |||
US2360932A (en) * | 1942-04-25 | 1944-10-24 | Bell Telephone Labor Inc | Negative resistance loading |
US2360940A (en) * | 1942-04-25 | 1944-10-24 | Bell Telephone Labor Inc | Negative resistance loading |
US2499423A (en) * | 1944-09-30 | 1950-03-07 | Hartford Nat Bank & Trust Comp | Telephone transmission circuits for coupling input and output devices to a telephone line |
-
0
- BE BE497800D patent/BE497800A/xx unknown
-
1949
- 1949-08-30 US US113072A patent/US2582498A/en not_active Expired - Lifetime
-
1950
- 1950-06-30 CH CH294911D patent/CH294911A/de unknown
- 1950-07-19 FR FR1034587D patent/FR1034587A/fr not_active Expired
- 1950-07-25 GB GB18551/50A patent/GB678993A/en not_active Expired
- 1950-08-28 DE DEW3396A patent/DE857649C/de not_active Expired
- 1950-10-23 US US191670A patent/US2742616A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR1034587A (fr) | 1953-07-27 |
GB678993A (en) | 1952-09-10 |
DE857649C (de) | 1952-12-01 |
CH294911A (de) | 1953-11-30 |
US2742616A (en) | 1956-04-17 |
US2582498A (en) | 1952-01-15 |