GB609861A - Improvements in or relating to neutralised push-pull amplifiers - Google Patents

Improvements in or relating to neutralised push-pull amplifiers

Info

Publication number
GB609861A
GB609861A GB8422/46A GB842246A GB609861A GB 609861 A GB609861 A GB 609861A GB 8422/46 A GB8422/46 A GB 8422/46A GB 842246 A GB842246 A GB 842246A GB 609861 A GB609861 A GB 609861A
Authority
GB
United Kingdom
Prior art keywords
valve
grid
neutralizing
push
line
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
GB8422/46A
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 Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB609861A publication Critical patent/GB609861A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
    • H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only

Landscapes

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

Abstract

609,861. Valve amplifying circuits. PHILIPS LAMPS, Ltd. March 19, 1946, No. 8422. Convention date, June 30, 1941. [Classes 40 (v) and 40 (vi)] In a push-pull amplifier in which neutralizing condensers 7, 8 are connected between the output electrode of each valve and the grid of the opposite. valve, parasitic oscillation is prevented by connecting a short-circuited transmission line 9 between the grid terminals of the two neutralizing condensers. The length of the line is arranged to approximate to an odd number of quarter wavelengths at signal frequency and an even number at the frequency of parasitic oscillation. When the anode of the valve forms part of the valve walls the neutralising condenser electrode may concentrically surround part of the anode, connection being made to the transmission line at a point diametrically opposite to the point of connection to the electrode of the grid. Neutralizing readjustments consequent upon changes of tuning of the amplifier may be carried out by varying the length of the line.
GB8422/46A 1941-06-30 1946-03-19 Improvements in or relating to neutralised push-pull amplifiers Expired GB609861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL609861X 1941-06-30

Publications (1)

Publication Number Publication Date
GB609861A true GB609861A (en) 1948-10-07

Family

ID=19788064

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8422/46A Expired GB609861A (en) 1941-06-30 1946-03-19 Improvements in or relating to neutralised push-pull amplifiers

Country Status (4)

Country Link
DE (1) DE860967C (en)
FR (1) FR883668A (en)
GB (1) GB609861A (en)
NL (1) NL61322C (en)

Also Published As

Publication number Publication date
FR883668A (en) 1943-07-12
DE860967C (en) 1952-12-29
NL61322C (en)

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