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
Application number
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.)
Publication of BE497800A publication Critical patent/BE497800A/xx

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
BE497800D 1949-08-30 BE497800A (fr)

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 (fr)

Family

ID=22347466

Family Applications (1)

Application Number Title Priority Date Filing Date
BE497800D BE497800A (fr) 1949-08-30

Country Status (6)

Country Link
US (2) US2582498A (fr)
BE (1) BE497800A (fr)
CH (1) CH294911A (fr)
DE (1) DE857649C (fr)
FR (1) FR1034587A (fr)
GB (1) GB678993A (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069692B (fr) * 1959-11-26
BE522796A (fr) * 1952-09-17
BE518901A (fr) * 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
NL90543C (fr) * 1955-10-25
US2904641A (en) * 1955-11-29 1959-09-15 Itt Negative-impedance repeater using a transistor amplifier
NL107975C (fr) * 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
US8446217B2 (en) * 2008-07-17 2013-05-21 Imec Dual-loop feedback amplifying circuit

Family Cites Families (16)

* Cited by examiner, † Cited by third party
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
GB516358A (en) * 1938-06-21 1939-01-01 Standard Telephones Cables Ltd Stabilized negative resistance and conductance devices
CH235160A (fr) * 1938-06-21 1944-11-15 Bell Telephone Mfg Circuit électrique.
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 (fr) * 1940-04-20
US2360940A (en) * 1942-04-25 1944-10-24 Bell Telephone Labor Inc Negative resistance loading
US2360932A (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

Also Published As

Publication number Publication date
US2742616A (en) 1956-04-17
FR1034587A (fr) 1953-07-27
DE857649C (de) 1952-12-01
US2582498A (en) 1952-01-15
GB678993A (en) 1952-09-10
CH294911A (de) 1953-11-30

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