FR977863A - Electric frequency discriminators - Google Patents
Electric frequency discriminatorsInfo
- Publication number
- FR977863A FR977863A FR977863DA FR977863A FR 977863 A FR977863 A FR 977863A FR 977863D A FR977863D A FR 977863DA FR 977863 A FR977863 A FR 977863A
- Authority
- FR
- France
- Prior art keywords
- electric frequency
- frequency discriminators
- discriminators
- electric
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
-
- 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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/52—Systems for determining direction or deviation from predetermined direction using a receiving antenna moving, or appearing to move, in a cyclic path to produce a Doppler variation of frequency of the received signal
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2626347A GB629444A (en) | 1947-09-29 | 1947-09-29 | Improvements in or relating to electric frequency discriminators |
Publications (1)
Publication Number | Publication Date |
---|---|
FR977863A true FR977863A (en) | 1951-04-06 |
Family
ID=10240896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR977863D Expired FR977863A (en) | 1947-09-29 | 1948-09-29 | Electric frequency discriminators |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR977863A (en) |
GB (1) | GB629444A (en) |
-
1947
- 1947-09-29 GB GB2626347A patent/GB629444A/en not_active Expired
-
1948
- 1948-09-29 FR FR977863D patent/FR977863A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB629444A (en) | 1949-09-20 |
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