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GB1155672A - Automatic Frequency Control Circuits - Google Patents

Automatic Frequency Control Circuits

Info

Publication number
GB1155672A
GB1155672A GB2222967A GB2222967A GB1155672A GB 1155672 A GB1155672 A GB 1155672A GB 2222967 A GB2222967 A GB 2222967A GB 2222967 A GB2222967 A GB 2222967A GB 1155672 A GB1155672 A GB 1155672A
Authority
GB
United Kingdom
Prior art keywords
capacitor
variable
capacitance
frequency control
automatic frequency
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
GB2222967A
Inventor
James Douglas Jones
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.)
Pye Electronic Products Ltd
Original Assignee
Pye 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 Pye Ltd filed Critical Pye Ltd
Priority to GB2222967A priority Critical patent/GB1155672A/en
Priority to DE19681766337 priority patent/DE1766337A1/en
Publication of GB1155672A publication Critical patent/GB1155672A/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
    • H03J7/08—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 using varactors, i.e. voltage variable reactive diodes
    • 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
    • H03J7/08—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 using varactors, i.e. voltage variable reactive diodes
    • H03J7/10—Modification of automatic frequency control sensitivity or linearising automatic frequency control operation

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

1,155,672. Automatic frequency control systems. PYE Ltd. 2 May, 1968 [12 May, 1967], No. 22229/67. Heading H3A. In an automatic frequency control oscillator circuit having a Lecher bar L1, Fig. 2 and variable capacitor C 2 as the primary frequency determining elements, the effective tuning capacity includes at least a proportion of the capacitance of a serially connected variable reactance device D and a further variable capacitor C 4 varying in capacitance as the first mentioned variable capacitor varies in capacitance. As shown, the reactance device D comprises a varactor diode, variable capacitor C2 is shunted by a trimmed capacitor C 1 , and variable capacitors C 1 , C 4 are ganged: diode D is connected to a tapping point on Lecher bar L 1 . In a construction, the stator plates F, Fig. 3, of capacitor C 2 are attached to and supported by a metallic band B 1 surrounding an insulating support ST, band B 1 forming one plate of tubular trimmer capacitor C 1 incorporated in support ST. Stator plate FA o f capacitor C 4 is attached to and supported by metallic band B 2 surrounding insulating support SA: the rotor plate of this capacitor may comprise the end rotor plate M of capacitor C2 together with an additional optional rotor plate MA. The latter may be provided with peripheral slots to allow of precise adjustment at a number of points in the tuning range.
GB2222967A 1967-05-12 1967-05-12 Automatic Frequency Control Circuits Expired GB1155672A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2222967A GB1155672A (en) 1967-05-12 1967-05-12 Automatic Frequency Control Circuits
DE19681766337 DE1766337A1 (en) 1967-05-12 1968-05-07 Automatic frequency control oscillator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2222967A GB1155672A (en) 1967-05-12 1967-05-12 Automatic Frequency Control Circuits

Publications (1)

Publication Number Publication Date
GB1155672A true GB1155672A (en) 1969-06-18

Family

ID=10176016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2222967A Expired GB1155672A (en) 1967-05-12 1967-05-12 Automatic Frequency Control Circuits

Country Status (2)

Country Link
DE (1) DE1766337A1 (en)
GB (1) GB1155672A (en)

Also Published As

Publication number Publication date
DE1766337A1 (en) 1971-07-01

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