BE552807A - - Google Patents
Info
- Publication number
- BE552807A BE552807A BE552807DA BE552807A BE 552807 A BE552807 A BE 552807A BE 552807D A BE552807D A BE 552807DA BE 552807 A BE552807 A BE 552807A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
- H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
- H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Transmitters (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US529111A US2790079A (en) | 1955-08-18 | 1955-08-18 | Multi-channel radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE552807A true BE552807A (de) |
Family
ID=24108571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE552807D BE552807A (de) | 1955-08-18 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2790079A (de) |
| BE (1) | BE552807A (de) |
| CH (1) | CH349306A (de) |
| DE (1) | DE1028626B (de) |
| GB (1) | GB797920A (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1082632B (de) | 1957-02-07 | 1960-06-02 | Bendix Aviat Corp | Auf zahlreiche Frequenzkanaele schaltbarer Funksendeempfaenger |
| US2881321A (en) * | 1957-08-30 | 1959-04-07 | Walter J Dauksher | Variable frequency crystal controlled oscillator |
| US3296549A (en) * | 1962-11-29 | 1967-01-03 | Einar C Johnson | Parallel capacitor controlled variable frequency oscillator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1727575A (en) * | 1927-02-15 | 1929-09-10 | Wired Radio Inc | Frequency-control system |
| DE501615C (de) * | 1928-09-10 | 1930-07-05 | Telefunken Gmbh | Verfahren zur Herstellung einer in ihrer Wellenlaenge veraenderlichen Traegerwelle bei kristallgesteuerten Kurzwellensendern und Empfangsanlagen |
| US2501591A (en) * | 1945-08-27 | 1950-03-21 | Premier Crystal Lab Inc | Multiband superheterodyne radio receiver having a push-button station selector |
| US2487857A (en) * | 1945-11-21 | 1949-11-15 | Collins Radio Co | Channelized high-frequency signal receiving system |
| US2555390A (en) * | 1946-02-18 | 1951-06-05 | Arthur A Glass | Audiometer |
-
0
- BE BE552807D patent/BE552807A/xx unknown
-
1955
- 1955-08-18 US US529111A patent/US2790079A/en not_active Expired - Lifetime
-
1956
- 1956-08-14 CH CH349306D patent/CH349306A/de unknown
- 1956-08-17 GB GB25217/56A patent/GB797920A/en not_active Expired
- 1956-08-18 DE DEI12078A patent/DE1028626B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB797920A (en) | 1958-07-09 |
| CH349306A (de) | 1960-10-15 |
| DE1028626B (de) | 1958-04-24 |
| US2790079A (en) | 1957-04-23 |