BE488964A - - Google Patents
Info
- Publication number
- BE488964A BE488964A BE488964DA BE488964A BE 488964 A BE488964 A BE 488964A BE 488964D A BE488964D A BE 488964DA BE 488964 A BE488964 A BE 488964A
- Authority
- BE
- Belgium
Links
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
- H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
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- 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
- H03D7/08—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 the same two electrodes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/008—Receiver or amplifier input circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H5/00—One-port networks comprising only passive electrical elements as network components
- H03H5/02—One-port networks comprising only passive electrical elements as network components without voltage- or current-dependent elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26251A US2581177A (en) | 1948-05-11 | 1948-05-11 | Frequency conversion system for superheterodyne radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE488964A true BE488964A (pt) |
Family
ID=21830736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE488964D BE488964A (pt) | 1948-05-11 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2581177A (pt) |
| BE (1) | BE488964A (pt) |
| FR (1) | FR985886A (pt) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1794708A (en) * | 1923-12-15 | 1931-03-03 | Nozieres Henri Leon A Francois | Signaling system |
| US1949842A (en) * | 1928-07-07 | 1934-03-06 | Telefunken Gmbh | Unicontrolled radio circuit |
| US1818157A (en) * | 1929-04-17 | 1931-08-11 | Maurice M Phillips | Radio receiving circuits |
| US1972189A (en) * | 1929-09-25 | 1934-09-04 | Radio Patents Corp | Radioreceiver |
| NL31542C (pt) * | 1930-01-31 | 1900-01-01 | ||
| BE383548A (pt) * | 1930-10-21 | |||
| US2052880A (en) * | 1932-09-21 | 1936-09-01 | Rca Corp | Radio circuit |
| US2359684A (en) * | 1942-12-30 | 1944-10-03 | Rca Corp | Loop input system for radio receivers |
| US2486986A (en) * | 1943-06-28 | 1949-11-01 | Rca Corp | Permeability tuning system |
-
0
- BE BE488964D patent/BE488964A/xx unknown
-
1948
- 1948-05-11 US US26251A patent/US2581177A/en not_active Expired - Lifetime
-
1949
- 1949-05-11 FR FR985886D patent/FR985886A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR985886A (fr) | 1951-07-24 |
| US2581177A (en) | 1952-01-01 |