GB646228A - Improvements in or relating to electrical coupling circuits - Google Patents

Improvements in or relating to electrical coupling circuits

Info

Publication number
GB646228A
GB646228A GB657748A GB657748A GB646228A GB 646228 A GB646228 A GB 646228A GB 657748 A GB657748 A GB 657748A GB 657748 A GB657748 A GB 657748A GB 646228 A GB646228 A GB 646228A
Authority
GB
United Kingdom
Prior art keywords
coupling
relating
electrical coupling
coupling circuits
ratio
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
GB657748A
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.)
RONALD CHARLES IMM
General Electric Co PLC
Original Assignee
RONALD CHARLES IMM
General Electric Co 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 RONALD CHARLES IMM, General Electric Co PLC filed Critical RONALD CHARLES IMM
Priority to GB657748A priority Critical patent/GB646228A/en
Publication of GB646228A publication Critical patent/GB646228A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator

Abstract

646,228. Transformers. GENERAL ELECTRIC CO., Ltd., and IMM, R. C. March 2, 1948, No. 6577. [Class 38 (ii)] [Also in Group XL (b)] Frequency- or phase-modulation apparatus includes at least one coupling circuit comprising two tuned circuits, so coupled that the ratio of the coupling factor to the critical coupling factor is within 10 per cent of 1/#3. If a number of coupling circuits are used, the overall value of this ratio is arranged to be within 5 per cent of 1/#3. The coupling circuit may be the I.F. transformer of a superheterodyne receiver. This is said to reduce distortion due to a non-linear phase/frequency characteristic.
GB657748A 1948-03-02 1948-03-02 Improvements in or relating to electrical coupling circuits Expired GB646228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB657748A GB646228A (en) 1948-03-02 1948-03-02 Improvements in or relating to electrical coupling circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB657748A GB646228A (en) 1948-03-02 1948-03-02 Improvements in or relating to electrical coupling circuits

Publications (1)

Publication Number Publication Date
GB646228A true GB646228A (en) 1950-11-15

Family

ID=9817025

Family Applications (1)

Application Number Title Priority Date Filing Date
GB657748A Expired GB646228A (en) 1948-03-02 1948-03-02 Improvements in or relating to electrical coupling circuits

Country Status (1)

Country Link
GB (1) GB646228A (en)

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