GB489636A - Carrier wave transmission systems - Google Patents

Carrier wave transmission systems

Info

Publication number
GB489636A
GB489636A GB2728/37A GB272837A GB489636A GB 489636 A GB489636 A GB 489636A GB 2728/37 A GB2728/37 A GB 2728/37A GB 272837 A GB272837 A GB 272837A GB 489636 A GB489636 A GB 489636A
Authority
GB
United Kingdom
Prior art keywords
frequency
distortion
intermediate frequency
modulation
potentials
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
GB2728/37A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB489636A publication Critical patent/GB489636A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
    • H03D3/004—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling an oscillator, e.g. the local oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Noise Elimination (AREA)
GB2728/37A 1936-03-26 1937-01-29 Carrier wave transmission systems Expired GB489636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70929A US2075503A (en) 1936-03-26 1936-03-26 Reception of frequency modulated waves

Publications (1)

Publication Number Publication Date
GB489636A true GB489636A (en) 1938-07-29

Family

ID=22098207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2728/37A Expired GB489636A (en) 1936-03-26 1937-01-29 Carrier wave transmission systems

Country Status (4)

Country Link
US (1) US2075503A (en:Method)
FR (1) FR822127A (en:Method)
GB (1) GB489636A (en:Method)
NL (1) NL49750C (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081938B (de) * 1955-10-29 1960-05-19 Int Standard Electric Corp Funkempfaenger zur Aufnahme von Traegerfrequenz- und Seitenbandkomponenten nach dem Korrelationsprinzip

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914866C (de) * 1940-08-01 1954-07-12 Lorenz C Ag Transponierungsempfaenger mit Frequenzgegenkupplung
US2684439A (en) * 1949-12-19 1954-07-20 Padevco Inc Frequency modulation receiver system for overlapping waves
DE1071160B (en:Method) * 1957-08-12
DE1122110B (de) * 1958-03-20 1962-01-18 Nippon Electric Co Empfangssystem fuer frequenz- oder phasenmodulierte Schwingungen
US3053981A (en) * 1959-07-06 1962-09-11 Security First Nat Bank High-gain frequency modulation tuner
NL277424A (en:Method) * 1961-04-25
US4293818A (en) * 1979-01-22 1981-10-06 International Telephone And Telegraph Corporation Frequency modulation threshold extension demodulator utilizing frequency compression feedback with frequency drift correction
US4991226A (en) * 1989-06-13 1991-02-05 Bongiorno James W FM detector with deviation manipulation
US5691666A (en) * 1995-06-07 1997-11-25 Owen; Joseph C. Full threshold FM deviation compression feedback demodulator and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081938B (de) * 1955-10-29 1960-05-19 Int Standard Electric Corp Funkempfaenger zur Aufnahme von Traegerfrequenz- und Seitenbandkomponenten nach dem Korrelationsprinzip

Also Published As

Publication number Publication date
NL49750C (en:Method)
FR822127A (fr) 1937-12-21
US2075503A (en) 1937-03-30

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