GB465515A - Improvements in wireless receivers - Google Patents

Improvements in wireless receivers

Info

Publication number
GB465515A
GB465515A GB2860934A GB2860934A GB465515A GB 465515 A GB465515 A GB 465515A GB 2860934 A GB2860934 A GB 2860934A GB 2860934 A GB2860934 A GB 2860934A GB 465515 A GB465515 A GB 465515A
Authority
GB
United Kingdom
Prior art keywords
receiver
oscillator
vary
variable
tuning
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
GB2860934A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2860934A priority Critical patent/GB465515A/en
Publication of GB465515A publication Critical patent/GB465515A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/042—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant with reactance tube

Landscapes

  • Circuits Of Receivers In General (AREA)

Abstract

465,515. Valve circuits for wireless reception. ROBINSON, J. Oct. 7, 1935, No. 28609/34. [Class 40 (v)] A wireless receiver is automatically brought into exact tune with a desired signal by a control potential derived by rectification from one of the receiving stages, and applied to vary the grid bias of a variable-mu valve associated with the tuning circuit of the receiver. The Figure shows a superheterodyne receiver in which part of the intermediate frequency energy is rectified at 17 and amplified at 18. The rectified potentials are then applied through a change-over switch 34 to the grid of a variable-mu oscillator 13 and vary the oscillator frequency in such sense as to bring the receiver into exact tune. The switch 34 is operated by an arm 35 in accordance with direction of rotation of the tuning knob 30 of the ganged tuning elements of the preselector 10 and local oscillator circuit 12 ; the automatic control is thus operative for either direction of rotation. The oscillator may have a fixed initial bias which is opposed by the applied control potentials ; by this arrangement, the control potential may be arranged to be a maximum at a predetermined frequency difference from exact tune. Specification 407,057 is referred to.
GB2860934A 1935-10-07 1935-10-07 Improvements in wireless receivers Expired GB465515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2860934A GB465515A (en) 1935-10-07 1935-10-07 Improvements in wireless receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2860934A GB465515A (en) 1935-10-07 1935-10-07 Improvements in wireless receivers

Publications (1)

Publication Number Publication Date
GB465515A true GB465515A (en) 1937-05-07

Family

ID=10278312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2860934A Expired GB465515A (en) 1935-10-07 1935-10-07 Improvements in wireless receivers

Country Status (1)

Country Link
GB (1) GB465515A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759792C (en) * 1941-01-15 1954-03-01 Lorenz C Ag Automatic antenna field tuning for transmitters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759792C (en) * 1941-01-15 1954-03-01 Lorenz C Ag Automatic antenna field tuning for transmitters

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