GB480017A - Improvements in or relating to automatic frequency control circuits for carrier wave receivers - Google Patents

Improvements in or relating to automatic frequency control circuits for carrier wave receivers

Info

Publication number
GB480017A
GB480017A GB2252436A GB2252436A GB480017A GB 480017 A GB480017 A GB 480017A GB 2252436 A GB2252436 A GB 2252436A GB 2252436 A GB2252436 A GB 2252436A GB 480017 A GB480017 A GB 480017A
Authority
GB
United Kingdom
Prior art keywords
oscillator
grid
voltage
frequency
control
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
GB2252436A
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 GB2252436A priority Critical patent/GB480017A/en
Publication of GB480017A publication Critical patent/GB480017A/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

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

480,017. Wireless receiving circuits. KINROSS, R. I. Aug. 15, 1936, No. 22524. [Class 40 (v)] The frequency changer valve 1 of a superheterodyne receiver also functions as a thermionic reactance or frequency control valve for automatic tuning by utilizing the mutual conductance existing between the oscillator anode and the control grid, part of the voltage across the tuned circuit 4, 5, of the local oscillator being fed to the signal grid over resistance 11, while the bias of that grid is varied in accordance with sense and magnitude of departure from exact tune by the usual error-detector network 22 ... 30. By this means a voltage 90‹ phase-displaced from the oscillator anode voltage is applied to the control grid, and the valve 1 presents across the circuit 4, 5 an inductive reactance variable with the bias on the control grid since the input circuit 6, 7 has a capacitative reactance at the oscillator frequency when the latter is higher than the signal frequency. The values of condenser 8 and resistance 11 are so chosen that about 1/ 20th of the oscillator voltage is transferred to the signal grid. To increase the range of automatic control with this arrangement the oscillator coil 4 may be wound in two opposing sections connected at their junction to the oscillator anode.
GB2252436A 1936-08-15 1936-08-15 Improvements in or relating to automatic frequency control circuits for carrier wave receivers Expired GB480017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2252436A GB480017A (en) 1936-08-15 1936-08-15 Improvements in or relating to automatic frequency control circuits for carrier wave receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2252436A GB480017A (en) 1936-08-15 1936-08-15 Improvements in or relating to automatic frequency control circuits for carrier wave receivers

Publications (1)

Publication Number Publication Date
GB480017A true GB480017A (en) 1938-02-15

Family

ID=10180764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2252436A Expired GB480017A (en) 1936-08-15 1936-08-15 Improvements in or relating to automatic frequency control circuits for carrier wave receivers

Country Status (1)

Country Link
GB (1) GB480017A (en)

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