GB946225A - Improvements in or relating to circuit arrangements comprising two successive valve amplifying stages - Google Patents

Improvements in or relating to circuit arrangements comprising two successive valve amplifying stages

Info

Publication number
GB946225A
GB946225A GB890460A GB890460A GB946225A GB 946225 A GB946225 A GB 946225A GB 890460 A GB890460 A GB 890460A GB 890460 A GB890460 A GB 890460A GB 946225 A GB946225 A GB 946225A
Authority
GB
United Kingdom
Prior art keywords
valve
anode
grid
relating
circuit arrangements
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
GB890460A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB946225A publication Critical patent/GB946225A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

946,225. Gain control arrangements. PHILIPS ELECTRICAL INDUSTRIES Ltd. March 14, 1960 [March 17, 1959], No. 8904/60. Heading H3Q. In a two-stage R.C. coupled amplifier and more especially in one employing a double valve, in which a volume control P is incorporated between the valves, high frequencies reach the anode of the second valve from the anode of the first via the stray capacity Ca between the two anodes, even when the volume control P is at minimum. To prevent this breakthrough a neutralizing circuit is provided comprising a resistor R in the grid lead of the second valve, which in conjunction with the anode to grid capacity of the second valve and the stray capacity between the anode of the first valve and the grid of the second forms a T-network passing energy of opposite phase to the anode of the second valve. A mathematical expression is given in the Specification relating to the factors involved.
GB890460A 1959-03-17 1960-03-14 Improvements in or relating to circuit arrangements comprising two successive valve amplifying stages Expired GB946225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP22421A DE1090722B (en) 1959-03-17 1959-03-17 Circuit arrangement with two successive tube amplifier stages

Publications (1)

Publication Number Publication Date
GB946225A true GB946225A (en) 1964-01-08

Family

ID=7368734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB890460A Expired GB946225A (en) 1959-03-17 1960-03-14 Improvements in or relating to circuit arrangements comprising two successive valve amplifying stages

Country Status (2)

Country Link
DE (1) DE1090722B (en)
GB (1) GB946225A (en)

Also Published As

Publication number Publication date
DE1090722B (en) 1960-10-13

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