BE426240A - - Google Patents
Info
- Publication number
- BE426240A BE426240A BE426240DA BE426240A BE 426240 A BE426240 A BE 426240A BE 426240D A BE426240D A BE 426240DA BE 426240 A BE426240 A BE 426240A
- 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
- H03G1/0041—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
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
- H03H7/251—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a thermistor
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Temperature (AREA)
- Thermistors And Varistors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE833355X | 1937-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE426240A true BE426240A (OSRAM) | 1938-03-31 |
Family
ID=6759143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE426240D BE426240A (OSRAM) | 1937-02-06 | 1938-02-07 |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT156762B (OSRAM) |
| BE (1) | BE426240A (OSRAM) |
| FR (1) | FR833355A (OSRAM) |
| GB (1) | GB514614A (OSRAM) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2811695A (en) * | 1954-10-18 | 1957-10-29 | Bell Telephone Labor Inc | Automatic level control |
| US3522453A (en) * | 1966-07-15 | 1970-08-04 | Jerrold Electronics Corp | Variable attenuators |
-
1938
- 1938-02-07 GB GB3836/38A patent/GB514614A/en not_active Expired
- 1938-02-07 FR FR833355D patent/FR833355A/fr not_active Expired
- 1938-02-07 BE BE426240D patent/BE426240A/xx unknown
- 1938-02-07 AT AT156762D patent/AT156762B/de active
Also Published As
| Publication number | Publication date |
|---|---|
| FR833355A (fr) | 1938-10-20 |
| GB514614A (en) | 1939-11-13 |
| AT156762B (de) | 1939-08-25 |