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GB257294A - Improvements in or relating to radio receivers - Google Patents

Improvements in or relating to radio receivers

Info

Publication number
GB257294A
GB257294A GB20792/26A GB2079226A GB257294A GB 257294 A GB257294 A GB 257294A GB 20792/26 A GB20792/26 A GB 20792/26A GB 2079226 A GB2079226 A GB 2079226A GB 257294 A GB257294 A GB 257294A
Authority
GB
United Kingdom
Prior art keywords
frequency
heterodyne
detector
modulated
audible
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
GB20792/26A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB257294A publication Critical patent/GB257294A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H04L27/063—Superheterodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Transceivers (AREA)

Abstract

257,294. Telefunken Ges. fur Drahtlose Telegraphie. Aug. 24, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Heterodyne receiving systems; thermionic heterodyne receivers.-In a wireless receiver of the heterodyne type, the local oscillations are modulated at an audible frequency. The modulation of the local oscillator U may be effected by an alternating plate supply current or by other means, and the modulated oscillations are combined in the circuit B with the incoming waves received on the aerial A. After rectification by the detector R. the beat current appears in the tuned circuit I, and is transferred to the second detector D giving an audible note in the phones T. The beat frequency may be greater or less than the wave frequency. The note heard does not vary with fluctuations of the transmitted frequency.
GB20792/26A 1925-08-24 1926-08-23 Improvements in or relating to radio receivers Expired GB257294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE257294X 1925-08-24

Publications (1)

Publication Number Publication Date
GB257294A true GB257294A (en) 1926-10-07

Family

ID=5966481

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20792/26A Expired GB257294A (en) 1925-08-24 1926-08-23 Improvements in or relating to radio receivers

Country Status (2)

Country Link
US (1) US1757325A (en)
GB (1) GB257294A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024254700A1 (en) * 2023-06-16 2024-12-19 Pulr Technologies Inc. Attachment device for cable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE517017A (en) * 1952-01-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024254700A1 (en) * 2023-06-16 2024-12-19 Pulr Technologies Inc. Attachment device for cable

Also Published As

Publication number Publication date
US1757325A (en) 1930-05-06

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