GB794726A - Gain-controlled radio frequency or intermediate frequency signal amplifying circuits - Google Patents

Gain-controlled radio frequency or intermediate frequency signal amplifying circuits

Info

Publication number
GB794726A
GB794726A GB3646754A GB3646754A GB794726A GB 794726 A GB794726 A GB 794726A GB 3646754 A GB3646754 A GB 3646754A GB 3646754 A GB3646754 A GB 3646754A GB 794726 A GB794726 A GB 794726A
Authority
GB
United Kingdom
Prior art keywords
valve
gain
signal amplifying
amplifying circuits
amplifier
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
GB3646754A
Inventor
Donald Henry Fisher
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 GB3646754A priority Critical patent/GB794726A/en
Publication of GB794726A publication Critical patent/GB794726A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

794,726. Automatic gain control. PYE, Ltd. Dec. 16, 1955 [Dec. 16, 1954], No. 36467/54. Class 40 (5). An automatic gain control circuit comprises a variable-mu valve V1 forming an R.F. or I.F. amplifier and a short grid base valve V2 forming a subsequent stage of the amplifier, connected for D.C. in series with the valve V1. The A.G.C. voltage is applied to the grid of the valve V2 which forms a D.C. amplifier whereby the valve V1 can be biased to cut off for a small change in current in the valve V2. A resistor R4 supplies anode current to the valve V2 when valve V1 is cut off, while resistors R1, R2 are provided for input impedance correction.
GB3646754A 1954-12-16 1954-12-16 Gain-controlled radio frequency or intermediate frequency signal amplifying circuits Expired GB794726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3646754A GB794726A (en) 1954-12-16 1954-12-16 Gain-controlled radio frequency or intermediate frequency signal amplifying circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3646754A GB794726A (en) 1954-12-16 1954-12-16 Gain-controlled radio frequency or intermediate frequency signal amplifying circuits

Publications (1)

Publication Number Publication Date
GB794726A true GB794726A (en) 1958-05-07

Family

ID=10388420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3646754A Expired GB794726A (en) 1954-12-16 1954-12-16 Gain-controlled radio frequency or intermediate frequency signal amplifying circuits

Country Status (1)

Country Link
GB (1) GB794726A (en)

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