GB454954A - Improvements in or relating to modulated carrier wave receivers - Google Patents

Improvements in or relating to modulated carrier wave receivers

Info

Publication number
GB454954A
GB454954A GB11160/35A GB1116035A GB454954A GB 454954 A GB454954 A GB 454954A GB 11160/35 A GB11160/35 A GB 11160/35A GB 1116035 A GB1116035 A GB 1116035A GB 454954 A GB454954 A GB 454954A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
energy
changer
combined
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
GB11160/35A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB11160/35A priority Critical patent/GB454954A/en
Priority to US73286A priority patent/US2129020A/en
Publication of GB454954A publication Critical patent/GB454954A/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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Catching Or Destruction (AREA)

Abstract

454,954. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and MURPHY, F. M. G., Orchard Lodge, London Road, Chelmsford. April 10, 1935, No. 11160. [Class 40 (v)] A single - side - band receiver of the frequency changing type for use when supplemental carrier energy is transmitted comprises a local oscillator 13 which supplies the detector 5. A second oscillator 14 energy from which is combined with the supplemental carrier frequency in a frequency changer 7 is provided and the output of the frequency changer 7 is combined with energy from the oscillator 13 and the product again combined with energy from the oscillator 14 in a second frequency changer 11 to give a frequency differing from that of oscillator 13 by the received carrier frequency which is used as the local oscillation frequency for the frequency changer 3. The oscillator 13 has a relatively low frequency equal to that of the intermediate frequency obtained from the output of the frequency changer 3. Since no sideband energy is present after the filter 8 energy may be taken after this point to effect automatic volume control.
GB11160/35A 1935-04-10 1935-04-10 Improvements in or relating to modulated carrier wave receivers Expired GB454954A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB11160/35A GB454954A (en) 1935-04-10 1935-04-10 Improvements in or relating to modulated carrier wave receivers
US73286A US2129020A (en) 1935-04-10 1936-04-08 Modulated carrier wave receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11160/35A GB454954A (en) 1935-04-10 1935-04-10 Improvements in or relating to modulated carrier wave receivers

Publications (1)

Publication Number Publication Date
GB454954A true GB454954A (en) 1936-10-12

Family

ID=9981117

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11160/35A Expired GB454954A (en) 1935-04-10 1935-04-10 Improvements in or relating to modulated carrier wave receivers

Country Status (2)

Country Link
US (1) US2129020A (en)
GB (1) GB454954A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735001A (en) * 1956-02-14 Witters
NL78602C (en) * 1943-10-21 1955-06-22
BE483326A (en) * 1946-11-02
US2509963A (en) * 1947-01-30 1950-05-30 Collins Radio Co Radio receiving and frequency conversion system
BE484646A (en) * 1947-09-03
US2647992A (en) * 1948-12-03 1953-08-04 Gen Electric Frequency stabilized radio receiving system
BE500946A (en) * 1950-02-03
US3196352A (en) * 1962-12-18 1965-07-20 Ibm Multilevel vestigial sideband suppressed carrier data transmission system
US3517268A (en) * 1965-09-10 1970-06-23 Nasa Phase demodulation system with two phase locked loops

Also Published As

Publication number Publication date
US2129020A (en) 1938-09-06

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