GB916160A - Improvements in or relating to frequency discriminator circuits - Google Patents

Improvements in or relating to frequency discriminator circuits

Info

Publication number
GB916160A
GB916160A GB1016358A GB1016358A GB916160A GB 916160 A GB916160 A GB 916160A GB 1016358 A GB1016358 A GB 1016358A GB 1016358 A GB1016358 A GB 1016358A GB 916160 A GB916160 A GB 916160A
Authority
GB
United Kingdom
Prior art keywords
tuned circuits
frequency
tuned
frequency discriminator
coupled
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
GB1016358A
Inventor
Walter Dougharty
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1016358A priority Critical patent/GB916160A/en
Publication of GB916160A publication Critical patent/GB916160A/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
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
    • H03D3/08—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of diodes, e.g. Foster-Seeley discriminator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

916,160. Frequency discriminators. ELECTRIC & MUSICAL INDUSTRIES Ltd. April 29, 1959 [March 29, 1958], No. 10163/58. Class 40 (5). A frequency discriminator of linear output about the centre frequency comprises a pair of off-tuned circuits 4, 5 with symmetrical frequency response outputs which are rectified and differentially combined, and each offtuned circuit comprises two tuned circuits of equal tuning and bandwidth inductively, but less than critically, coupled. The tuned circuits may be damped by shunt resistors 14. In modifications the tuned circuits are coupled by inductances 13 forming a T or a #-network. Also, each off-tuned branch may be fed in parallel from a single amplifier.
GB1016358A 1958-03-29 1958-03-29 Improvements in or relating to frequency discriminator circuits Expired GB916160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1016358A GB916160A (en) 1958-03-29 1958-03-29 Improvements in or relating to frequency discriminator circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1016358A GB916160A (en) 1958-03-29 1958-03-29 Improvements in or relating to frequency discriminator circuits

Publications (1)

Publication Number Publication Date
GB916160A true GB916160A (en) 1963-01-23

Family

ID=9962693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1016358A Expired GB916160A (en) 1958-03-29 1958-03-29 Improvements in or relating to frequency discriminator circuits

Country Status (1)

Country Link
GB (1) GB916160A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1906957A1 (en) * 1968-02-15 1969-11-06 Rca Corp WM detector circuit
DE2943801A1 (en) * 1978-10-30 1980-05-14 Rca Corp ARRANGEMENT FOR OBTAINING SIGNALS FOR AUTOMATIC FREQUENCY CONTROL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1906957A1 (en) * 1968-02-15 1969-11-06 Rca Corp WM detector circuit
DE2943801A1 (en) * 1978-10-30 1980-05-14 Rca Corp ARRANGEMENT FOR OBTAINING SIGNALS FOR AUTOMATIC FREQUENCY CONTROL
FR2440654A1 (en) * 1978-10-30 1980-05-30 Rca Corp PRECISE AUTOMATIC TUNING CIRCUIT

Similar Documents

Publication Publication Date Title
GB606910A (en) Improvements in or relating to frequency transposing devices
ES487706A1 (en) Receiver having a search tuning circuit
GB916160A (en) Improvements in or relating to frequency discriminator circuits
GB1057513A (en) Improvements in or relating to low level signal amplifiers
GB1044032A (en) Balanced stereophonic demodulator apparatus
GB820550A (en) Improvements in tuned cavity systems
GB981433A (en) Frequency discriminator circuit
GB1262875A (en) Angle modulation system
GB917819A (en) Improvements in or relating to receiver circuit arrangements comprising a ratio detector
GB773470A (en) Improvements in or relating to detector-circuit arrangements
GB896688A (en) Improvements in or relating to frequency discriminators
GB1100619A (en) Improvements in frequency discriminators
GB945269A (en) Balanced frequency detector circuit
GB1013022A (en) Improvements in or relating to tuning indicators for am/fm receivers
GB1081852A (en) Improvements in or relating to electrical frequency discriminators
GB1013021A (en) Improvements in or relating to tuning indication circuits for am/fm receivers
JPS5468142A (en) Btl amplifying circuit
GB1047531A (en) Receiver and communication system including such a receiver
GB1126030A (en) Improvements in or relating to frequency demodulators
JPS55133154A (en) Compensation circuit for cross polarized wave
GB796082A (en) Improved a.m. or f.m. radio receiver detector circuit
GB945710A (en) Improvements in crystal discriminators
GB792350A (en) Improvements in or relating to single-sideband radio receivers
GB1285997A (en) Apparatus for deriving a signal proportional to a change-function of phase angle
JPS5286710A (en) Am-fm radio receiver