BE434444A - - Google Patents
Info
- Publication number
- BE434444A BE434444A BE434444DA BE434444A BE 434444 A BE434444 A BE 434444A BE 434444D A BE434444D A BE 434444DA BE 434444 A BE434444 A BE 434444A
- Authority
- BE
- Belgium
Links
Classifications
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
- F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
- F24F6/06—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using moving unheated wet elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
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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
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Amplifiers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Details Of Television Scanning (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL217992X | 1939-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE434444A true BE434444A (US06653308-20031125-C00197.png) |
Family
ID=34709394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE434444D BE434444A (US06653308-20031125-C00197.png) | 1939-07-01 |
Country Status (6)
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2488357A (en) * | 1947-05-20 | 1949-11-15 | Mcclatchy Broadeasting Company | Negative feedback amplifying circuit |
GB721550A (en) * | 1952-01-24 | 1955-01-05 | Marconi Wireless Telegraph Co | Improvements in or relating to gain control circuit arrangements |
-
0
- NL NL64722D patent/NL64722C/xx active
- BE BE434444D patent/BE434444A/xx unknown
-
1939
- 1939-01-04 US US249242A patent/US2232850A/en not_active Expired - Lifetime
- 1939-05-16 GB GB14647/39A patent/GB528893A/en not_active Expired
- 1939-05-17 CH CH212944D patent/CH212944A/de unknown
- 1939-05-19 FR FR856581D patent/FR856581A/fr not_active Expired
-
1941
- 1941-04-29 CH CH217992D patent/CH217992A/de unknown
Also Published As
Publication number | Publication date |
---|---|
GB528893A (en) | 1940-11-08 |
CH217992A (de) | 1941-11-15 |
US2232850A (en) | 1941-02-25 |
CH212944A (de) | 1940-12-31 |
FR856581A (fr) | 1940-06-18 |
NL64722C (US06653308-20031125-C00197.png) |