GB703928A - Improvements in modulating or demodulating devices - Google Patents

Improvements in modulating or demodulating devices

Info

Publication number
GB703928A
GB703928A GB249851A GB249851A GB703928A GB 703928 A GB703928 A GB 703928A GB 249851 A GB249851 A GB 249851A GB 249851 A GB249851 A GB 249851A GB 703928 A GB703928 A GB 703928A
Authority
GB
United Kingdom
Prior art keywords
load
modulating
reference source
source
phase
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
GB249851A
Inventor
Frederick Roger Milson
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.)
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England Ltd
Original Assignee
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England 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 FURZEHILL LAB Ltd, S Smith and Sons Ltd, S Smith and Sons England Ltd filed Critical FURZEHILL LAB Ltd
Priority to GB249851A priority Critical patent/GB703928A/en
Publication of GB703928A publication Critical patent/GB703928A/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
    • H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
    • H03C1/56—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only
    • H03C1/58—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits

Landscapes

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

Abstract

703,928. Modulating systems. SMITH & SONS (ENGLAND), Ltd., S., and FURZEHILL, LABORATORIES, Ltd. Feb. 1, 1952 [Feb. 1, 1951], No. 2498/51. Class 40 (5) An A.C. signal demodulator detects the magnitude and phase of an A.C. source 1 with respect to a cophasal or anti-phase A.C. reference source 2 as a D.C. voltage across a load 3 of varying magnitude and sign. As shown, two equal, but in anti-phase, voltages are developed across the secondary circuit terminals 7, 8 and 9, 10 respectively of a signal input transformer 4 and are connected through rectifiers 15, 16 and 17, 18 of the same polarity but different for each pair to the load 3, and one terminal of the A.C. reference source 2 is connected to the common mid-points of equal pairs of resistors 11, 12 and 13, 14 shunting the secondary circuits, the other terminals being connected to the mid-point of equal resistors 19, 20 across the load. The rectifiers effectively act as switches operated in pairs and in turn by the reference source 2. A plurality of such demodulators, e.g. between successive stages of a magnetic amplifier, may be connected. to a single A.C. reference source. Alternatively the device may act as a modulator, the modulating signal, applied at 1, modulating across the load 3 the oscillations from the A.C. source. 2.
GB249851A 1951-02-01 1951-02-01 Improvements in modulating or demodulating devices Expired GB703928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB249851A GB703928A (en) 1951-02-01 1951-02-01 Improvements in modulating or demodulating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB249851A GB703928A (en) 1951-02-01 1951-02-01 Improvements in modulating or demodulating devices

Publications (1)

Publication Number Publication Date
GB703928A true GB703928A (en) 1954-02-10

Family

ID=9740628

Family Applications (1)

Application Number Title Priority Date Filing Date
GB249851A Expired GB703928A (en) 1951-02-01 1951-02-01 Improvements in modulating or demodulating devices

Country Status (1)

Country Link
GB (1) GB703928A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387546A1 (en) * 1977-04-15 1978-11-10 Northern Telecom Ltd DIGITAL PHASE MODULATOR IN SHARED RING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387546A1 (en) * 1977-04-15 1978-11-10 Northern Telecom Ltd DIGITAL PHASE MODULATOR IN SHARED RING

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