GB461749A - Improvements in or relating to systems of radio transmission and reception - Google Patents

Improvements in or relating to systems of radio transmission and reception

Info

Publication number
GB461749A
GB461749A GB2367035A GB2367035A GB461749A GB 461749 A GB461749 A GB 461749A GB 2367035 A GB2367035 A GB 2367035A GB 2367035 A GB2367035 A GB 2367035A GB 461749 A GB461749 A GB 461749A
Authority
GB
United Kingdom
Prior art keywords
carrier
signal
transmitted
radiated
periodically
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
GB2367035A
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.)
DAVID MALCOLM JOHNSTONE
Baird Television Ltd
Original Assignee
DAVID MALCOLM JOHNSTONE
Baird Television 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 DAVID MALCOLM JOHNSTONE, Baird Television Ltd filed Critical DAVID MALCOLM JOHNSTONE
Priority to GB2367035A priority Critical patent/GB461749A/en
Publication of GB461749A publication Critical patent/GB461749A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/68—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for wholly or partially suppressing the carrier or one side band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Toys (AREA)
  • Transmitters (AREA)

Abstract

461,749. Wireless signalling. JOHNSTONE, D. M., and BAIRD TELEVISION, Ltd. Aug. 23, 1935, No. 23670. [Class 40 (v)] A carrier wave is transmitted in successive periods of substantially equal duration, the amplitude during any one period being constant and a function of that of the modulating signal. A control signal of the same periodicity as the carrier interruption frequency is simultaneously transmitted. At the transmitter an amplifying valve 3 fed with the modulating currents is followed by a sharply tuned circuit 5, which may be a critically regenerative valve circuit and is periodically biassed to cut-off by a pulse generator 4. The signals thus produced feed an amplifier 6 and are then radiated. A carrier is also transmitted modulated with impulses from the generator 4. At the receiver a sharply tuned circuit responsive to the signal carrier is periodically quenched by the receiver control signal which, if necessary, may be passed through a phase-shifting device. A common control-frequency signal may be radiated for several transmitters. Specification 455,298 is referred to.
GB2367035A 1935-08-23 1935-08-23 Improvements in or relating to systems of radio transmission and reception Expired GB461749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2367035A GB461749A (en) 1935-08-23 1935-08-23 Improvements in or relating to systems of radio transmission and reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2367035A GB461749A (en) 1935-08-23 1935-08-23 Improvements in or relating to systems of radio transmission and reception

Publications (1)

Publication Number Publication Date
GB461749A true GB461749A (en) 1937-02-23

Family

ID=10199380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2367035A Expired GB461749A (en) 1935-08-23 1935-08-23 Improvements in or relating to systems of radio transmission and reception

Country Status (1)

Country Link
GB (1) GB461749A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520136A (en) * 1944-09-15 1950-08-29 Int Standard Electric Corp Superregenerative receiver for electromagnetic waves
US2573762A (en) * 1946-03-27 1951-11-06 Philco Corp Radar receiver sensitivity control system
US2790165A (en) * 1946-02-13 1957-04-23 Jesse R Lien Super-regenerative receiver
US3688313A (en) * 1966-12-19 1972-08-29 Motorola Inc Combined cw and pulse tracking systems

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520136A (en) * 1944-09-15 1950-08-29 Int Standard Electric Corp Superregenerative receiver for electromagnetic waves
US2790165A (en) * 1946-02-13 1957-04-23 Jesse R Lien Super-regenerative receiver
US2573762A (en) * 1946-03-27 1951-11-06 Philco Corp Radar receiver sensitivity control system
US3688313A (en) * 1966-12-19 1972-08-29 Motorola Inc Combined cw and pulse tracking systems

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