GB630132A - Improvements in or relating to thermionic valve amplifiers - Google Patents

Improvements in or relating to thermionic valve amplifiers

Info

Publication number
GB630132A
GB630132A GB1491146A GB1491146A GB630132A GB 630132 A GB630132 A GB 630132A GB 1491146 A GB1491146 A GB 1491146A GB 1491146 A GB1491146 A GB 1491146A GB 630132 A GB630132 A GB 630132A
Authority
GB
United Kingdom
Prior art keywords
impedance
feedback
screen
resistance
resistances
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
GB1491146A
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 GB1491146A priority Critical patent/GB630132A/en
Publication of GB630132A publication Critical patent/GB630132A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
    • H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

630,132. Valve amplifying circuits. JOHNSON, L. R. J., HOLLOWAY, D. G., and WHITE, E. L. C. May 17, 1946, No. 14911. [Class 40 (vi)] The distributed shunt capacity of an impedance in the negative feedback path of an amplifier is neutralized by applying an additional feedback voltage to a screen surrounding the impedance or to one or more different points on the impedance. The screen may be a resistance winding or a semi-conducting member. As shown, the output of a television transmitting tube 6 is fed to a four-stage amplifier 7, 8, 9, 10 across resistances R3, R4 which have distributed shunt capacity 2. Part of the output derived from the cathode follower 10 is fed back from a tapping on the load resistor 35 to the low potential end of resistance R4, while a portion of the feedback derived from potentiometer 38, 39 is applied via condenser 5 to the junction of resistances R3, R4. The resistance 39 may be shunted by a condenser 40 to compensate for phase shift in the feedback loop. The additional feedback may be applied to a screen surrounding the feedback impedance from one end to a point of substantially zero signal potential, at which point the screen is earthed, Fig. 1 (not shown).
GB1491146A 1946-05-17 1946-05-17 Improvements in or relating to thermionic valve amplifiers Expired GB630132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1491146A GB630132A (en) 1946-05-17 1946-05-17 Improvements in or relating to thermionic valve amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1491146A GB630132A (en) 1946-05-17 1946-05-17 Improvements in or relating to thermionic valve amplifiers

Publications (1)

Publication Number Publication Date
GB630132A true GB630132A (en) 1949-10-06

Family

ID=10049717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1491146A Expired GB630132A (en) 1946-05-17 1946-05-17 Improvements in or relating to thermionic valve amplifiers

Country Status (1)

Country Link
GB (1) GB630132A (en)

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