GB950585A - Improvements relating to single sideband electrical modulator apparatus - Google Patents

Improvements relating to single sideband electrical modulator apparatus

Info

Publication number
GB950585A
GB950585A GB1678659A GB1678659A GB950585A GB 950585 A GB950585 A GB 950585A GB 1678659 A GB1678659 A GB 1678659A GB 1678659 A GB1678659 A GB 1678659A GB 950585 A GB950585 A GB 950585A
Authority
GB
United Kingdom
Prior art keywords
sin
modulator
plate
single sideband
cos
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
GB1678659A
Inventor
Christopher Donald Ewar Spence
Emanuel Cohen
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB1678659A priority Critical patent/GB950585A/en
Publication of GB950585A publication Critical patent/GB950585A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/60—Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed

Landscapes

  • Amplifiers (AREA)
  • Amplitude Modulation (AREA)

Abstract

950,585. Amplitude modulating systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 13, 1960 [May 15, 1959], No. 16786/59. Heading H4L. A single sideband modulated wave sin (#c+#m).t is derived as the sum of two products (sin #c.cos #mt) and (cos #c.t sin # m t) from Hall plate multipliers each having a semi-conductor plate between two ferrite members. To this the carrier sin #c.t is applied to the semiconductor plate of one Hall modulator M2 and to the magnetic field coil of the other modulator Ml so that it is applied in relative phase quadrature to both modulators. Further, the modulation sin # mt is directly applied to the plate of the modulator M1 and through a 90 degrees phase shifter to the magnetic field coil of the other modulator, an amplifier A also ensuring the current through the coil impedance being constant for all frequencies in the modulation range. As shown, the outputs may be added by a transformer and applied to class B amplifiers before transmission. The 90 degrees phase shifter may comprise two cathode followers with inputs in opposite phase and each output energizing, through a capacitor and an inductor respectively a common resistance. Specification 883,338 is referred to.
GB1678659A 1959-05-15 1959-05-15 Improvements relating to single sideband electrical modulator apparatus Expired GB950585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1678659A GB950585A (en) 1959-05-15 1959-05-15 Improvements relating to single sideband electrical modulator apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1678659A GB950585A (en) 1959-05-15 1959-05-15 Improvements relating to single sideband electrical modulator apparatus

Publications (1)

Publication Number Publication Date
GB950585A true GB950585A (en) 1964-02-26

Family

ID=10083631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1678659A Expired GB950585A (en) 1959-05-15 1959-05-15 Improvements relating to single sideband electrical modulator apparatus

Country Status (1)

Country Link
GB (1) GB950585A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213620A1 (en) * 1972-12-20 1974-08-02 Cit Alcatel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213620A1 (en) * 1972-12-20 1974-08-02 Cit Alcatel

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