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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
-
- 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
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL217992X | 1939-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE434444A true BE434444A (en) |
Family
ID=34709394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE434444D BE434444A (en) | 1939-07-01 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2232850A (en) |
| BE (1) | BE434444A (en) |
| CH (2) | CH212944A (en) |
| FR (1) | FR856581A (en) |
| GB (1) | GB528893A (en) |
| NL (1) | NL64722C (en) |
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/en unknown
- 1939-05-19 FR FR856581D patent/FR856581A/en not_active Expired
-
1941
- 1941-04-29 CH CH217992D patent/CH217992A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH217992A (en) | 1941-11-15 |
| GB528893A (en) | 1940-11-08 |
| FR856581A (en) | 1940-06-18 |
| CH212944A (en) | 1940-12-31 |
| US2232850A (en) | 1941-02-25 |
| NL64722C (en) |