BE505025A - - Google Patents
Info
- Publication number
- BE505025A BE505025A BE505025DA BE505025A BE 505025 A BE505025 A BE 505025A BE 505025D A BE505025D A BE 505025DA BE 505025 A BE505025 A BE 505025A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
- H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Radio Relay Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL700129X | 1950-08-02 | ||
GB5695/55A GB764175A (en) | 1950-08-02 | 1955-02-25 | Improvements in or relating to safe-guarding arrangements for electric communicationsystems |
Publications (1)
Publication Number | Publication Date |
---|---|
BE505025A true BE505025A (fi) |
Family
ID=26240078
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE505025D BE505025A (fi) | 1950-08-02 | ||
BE544533D BE544533A (fi) | 1950-08-02 | ||
BE505008D BE505008A (fi) | 1950-08-02 |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE544533D BE544533A (fi) | 1950-08-02 | ||
BE505008D BE505008A (fi) | 1950-08-02 |
Country Status (6)
Country | Link |
---|---|
US (2) | US2740850A (fi) |
BE (3) | BE505008A (fi) |
DE (3) | DE972713C (fi) |
FR (7) | FR981784A (fi) |
GB (3) | GB672169A (fi) |
NL (2) | NL78172C (fi) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3029317A (en) * | 1956-09-28 | 1962-04-10 | Rca Corp | Frequency selective negative feedback recording circuitry |
US3047815A (en) * | 1959-07-03 | 1962-07-31 | Gen Electric | Phase component eliminator |
GB886257A (en) * | 1959-10-29 | 1962-01-03 | John Somerset Murray | Valve amplifier |
US3178698A (en) * | 1960-09-14 | 1965-04-13 | Bell Telephone Labor Inc | Regulator alarm circuit |
US3328716A (en) * | 1963-09-03 | 1967-06-27 | Automatic Elect Lab | Gain regulation circuit utilizing electrochemical memory means in variolosser control circuit |
US3359511A (en) * | 1964-11-04 | 1967-12-19 | Ampex | Automatic gain control system with pilot signal |
AU407352B2 (en) * | 1965-12-29 | 1970-10-15 | Improvements in automatic gain regulators | |
US3763434A (en) * | 1972-03-02 | 1973-10-02 | Motorola Inc | Battery connecting structure for portable device |
US4287477A (en) * | 1979-02-22 | 1981-09-01 | Dynamic Compliance, Incorporated | Feedback arrangement |
US5742202A (en) * | 1996-05-31 | 1998-04-21 | Scientific-Atlanta, Inc. | Method and apparatus for dynamic automatic gain control when pilot signal is lost |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1984400A (en) * | 1928-04-26 | 1934-12-18 | Rca Corp | Sensitivity control for radio receiving systems |
US1822758A (en) * | 1928-09-21 | 1931-09-08 | Toulon Pierre Marie Gabriel | System for transmitting and amplifying vibratory currents and movements |
US1859498A (en) * | 1928-10-02 | 1932-05-24 | American Telephone & Telegraph | Vacuum tube control system |
US1811954A (en) * | 1928-12-17 | 1931-06-30 | American Telephone & Telegraph | Transmission volume control |
DE584781C (de) * | 1930-03-06 | 1933-09-23 | Aeg | Elektrodynamischer Lautsprecher |
US1949848A (en) * | 1930-08-04 | 1934-03-06 | Rca Corp | Radioreceiver |
GB413383A (en) * | 1933-01-25 | 1934-07-19 | Leonard Ernest Ryall | Variable attenuation networks capable of providing automatic volume control of alternating signal currents |
DE657057C (de) * | 1933-08-31 | 1938-02-24 | Siemens & Halske Akt Ges | Anordnung zur Regelung des UEbertragungsmasses in Signaluebertragungssystemen |
GB438565A (en) * | 1934-05-26 | 1935-11-19 | Standard Telephones Cables Ltd | Thermionic valve circuits |
NL43890C (fi) * | 1935-01-05 | |||
GB456062A (en) * | 1935-03-28 | 1936-10-28 | Frederick Gordon Frost | Improvements in and relating to circuits for use with thermionic valves |
US2220770A (en) * | 1937-01-30 | 1940-11-05 | Gen Electric | Apparatus for controlling the apparent resistance of an amplifier anode |
AT159204B (de) * | 1938-02-26 | 1940-07-25 | Siemens Ag | Verfahren und Anordnung zur Erfassung oder Beeinflussung der Bewegungsvorgänge in dynamischen Lautsprechern. |
US2365575A (en) * | 1941-12-31 | 1944-12-19 | Gen Electric | Electron discharge amplifier |
US2383867A (en) * | 1943-01-13 | 1945-08-28 | Rca Corp | Power output amplifier circuit |
US2379069A (en) * | 1943-07-24 | 1945-06-26 | Bell Telephone Labor Inc | Automatic line testing and switching circuits |
US2396990A (en) * | 1943-12-09 | 1946-03-19 | Bell Telephone Labor Inc | Automatic line testing and switching circuits |
GB673258A (en) * | 1949-05-28 | 1952-06-04 | Rca Corp | Improvements in signal amplitude control systems employing semi-conductor devices |
GB693255A (en) * | 1951-04-12 | 1953-06-24 | Automatic Telephone & Elect | Improvements in or relating to carrier current transmission systems |
-
0
- NL NL696908332A patent/NL155159B/xx unknown
- BE BE505025D patent/BE505025A/xx unknown
- BE BE544533D patent/BE544533A/xx unknown
- NL NL78172D patent/NL78172C/xx active
- BE BE505008D patent/BE505008A/xx unknown
-
1949
- 1949-02-25 FR FR981784D patent/FR981784A/fr not_active Expired
-
1950
- 1950-07-28 GB GB18892/50A patent/GB672169A/en not_active Expired
-
1951
- 1951-07-26 FR FR61930D patent/FR61930E/fr not_active Expired
- 1951-07-26 FR FR64203D patent/FR64203E/fr not_active Expired
- 1951-07-27 GB GB17856/51A patent/GB700129A/en not_active Expired
- 1951-07-30 US US239213A patent/US2740850A/en not_active Expired - Lifetime
- 1951-08-01 DE DEI4440A patent/DE972713C/de not_active Expired
- 1951-08-02 FR FR64204D patent/FR64204E/fr not_active Expired
-
1955
- 1955-02-25 GB GB5695/55A patent/GB764175A/en not_active Expired
- 1955-05-20 FR FR67870D patent/FR67870E/fr not_active Expired
-
1956
- 1956-01-13 DE DEJ11173A patent/DE1108277B/de active Pending
- 1956-01-19 FR FR70706D patent/FR70706E/fr not_active Expired
- 1956-02-23 US US567377A patent/US2921267A/en not_active Expired - Lifetime
- 1956-02-24 DE DEI11337A patent/DE1027730B/de active Pending
- 1956-02-24 FR FR71323D patent/FR71323E/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB764175A (en) | 1956-12-19 |
GB672169A (en) | 1952-05-14 |
DE1027730B (de) | 1958-04-10 |
DE972713C (de) | 1959-09-10 |
NL155159B (nl) | |
FR61930E (fr) | 1955-05-31 |
FR64203E (fr) | 1955-11-09 |
FR64204E (fr) | 1955-11-09 |
FR67870E (fr) | 1958-03-25 |
DE1108277B (de) | 1961-06-08 |
GB700129A (en) | 1953-11-25 |
NL78172C (fi) | |
BE544533A (fi) | |
BE505008A (fi) | |
FR70706E (fr) | 1959-06-10 |
FR981784A (fr) | 1951-05-30 |
US2921267A (en) | 1960-01-12 |
US2740850A (en) | 1956-04-03 |
FR71323E (fr) | 1959-12-22 |