NL55159C - - Google Patents
Info
- Publication number
- NL55159C NL55159C NL55159DA NL55159C NL 55159 C NL55159 C NL 55159C NL 55159D A NL55159D A NL 55159DA NL 55159 C NL55159 C NL 55159C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
- H04B3/12—Control of transmission; Equalising by pilot signal in negative-feedback path of line amplifier
-
- 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
- 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
- H03G1/0041—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using thermistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US198619A US2188671A (en) | 1938-03-29 | 1938-03-29 | Wave amplifying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL55159C true NL55159C (xx) | 1943-04-15 |
Family
ID=22734105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL55159D NL55159C (xx) | 1938-03-29 | 1939-02-15 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2188671A (xx) |
| FR (1) | FR852274A (xx) |
| GB (1) | GB524340A (xx) |
| NL (1) | NL55159C (xx) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR957766A (xx) * | 1945-06-02 | 1950-02-25 | ||
| US2592738A (en) * | 1945-09-19 | 1952-04-15 | Us Navy | Electronically controlled low impedance phase shifting device |
| US2567824A (en) * | 1947-03-18 | 1951-09-11 | Bell Telephone Labor Inc | Automatic gain control |
| NL234187A (xx) * | 1958-12-12 | |||
| US3062994A (en) * | 1960-01-19 | 1962-11-06 | Gilbert & Barker Mfg Co | Electronic level sensing servosystem |
-
1938
- 1938-03-29 US US198619A patent/US2188671A/en not_active Expired - Lifetime
-
1939
- 1939-01-27 GB GB2892/39A patent/GB524340A/en not_active Expired
- 1939-02-15 NL NL55159D patent/NL55159C/xx active
- 1939-03-28 FR FR852274D patent/FR852274A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB524340A (en) | 1940-08-05 |
| US2188671A (en) | 1940-01-30 |
| FR852274A (fr) | 1940-01-27 |