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FR977863A - Electric frequency discriminators - Google Patents

Electric frequency discriminators

Info

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
Application number
Other languages
French (fr)
Inventor
Charles William Earp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR977863A publication Critical patent/FR977863A/en
Expired legal-status Critical Current

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

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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR977863D 1947-09-29 1948-09-29 Electric frequency discriminators Expired FR977863A (en)

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)

Also Published As

Publication number Publication date
GB629444A (en) 1949-09-20

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