GB670510A - A method of and means for suppressing or reducing interference in radio receiving apparatus - Google Patents

A method of and means for suppressing or reducing interference in radio receiving apparatus

Info

Publication number
GB670510A
GB670510A GB1073249A GB1073249A GB670510A GB 670510 A GB670510 A GB 670510A GB 1073249 A GB1073249 A GB 1073249A GB 1073249 A GB1073249 A GB 1073249A GB 670510 A GB670510 A GB 670510A
Authority
GB
United Kingdom
Prior art keywords
aerial
transformer
receiving apparatus
radio receiving
output
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
GB1073249A
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.)
SHARDLOW ELECTRIC WIRES Ltd
Original Assignee
SHARDLOW ELECTRIC WIRES 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 SHARDLOW ELECTRIC WIRES Ltd filed Critical SHARDLOW ELECTRIC WIRES Ltd
Priority to GB1073249A priority Critical patent/GB670510A/en
Publication of GB670510A publication Critical patent/GB670510A/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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Noise Elimination (AREA)

Abstract

670,510. Radio receiving circuits. SHARDLOW ELECTRIC WIRES, Ltd., and MOULTON, E. W. June 30, 1950 [April 22, 1949], No. 10732/49. Class 40 (v). In an arrangement for interference suppression in high-frequency radio receiving apparatus utilizing two aerials, one a vertical aerial for operating at a specified frequency or band of frequencies and the other a horizontal aerial for operating at a specified frequency or band of frequencies, each aerial is connected by a low impedance or balanced feeder cable from a voltage node to a balanced transformer system so that the unwanted signal received by both aerials is anti-phased in the said system, the output from which is fed to the normal receiver input. As shown, a conventional television dipole aerial A1 is connected through a transformer L1 to the control grid of a valve V1, and a similar aerial A2, but arranged so that it picks up only unwanted radiations, is connected through transformer L2 to valve V2. The anodes of valves V1, V2 are respectively connected to each end of the primary T.P. of a transformer, H.T.+ being connected to the centre tap of the winding, and the output from the secondary winding T.S. is connected to the normal input of the receiving apparatus. A potentiometer P provides an adjustment of the relative amplification of valves V1, V2, and differential condensers IC and OC compensate for variations of self-capacitance in the input and output circuits respectively.
GB1073249A 1949-04-22 1949-04-22 A method of and means for suppressing or reducing interference in radio receiving apparatus Expired GB670510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1073249A GB670510A (en) 1949-04-22 1949-04-22 A method of and means for suppressing or reducing interference in radio receiving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1073249A GB670510A (en) 1949-04-22 1949-04-22 A method of and means for suppressing or reducing interference in radio receiving apparatus

Publications (1)

Publication Number Publication Date
GB670510A true GB670510A (en) 1952-04-23

Family

ID=9973265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1073249A Expired GB670510A (en) 1949-04-22 1949-04-22 A method of and means for suppressing or reducing interference in radio receiving apparatus

Country Status (1)

Country Link
GB (1) GB670510A (en)

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