GB480417A - Improvements in high frequency signal amplifiers - Google Patents

Improvements in high frequency signal amplifiers

Info

Publication number
GB480417A
GB480417A GB15440/37A GB1544037A GB480417A GB 480417 A GB480417 A GB 480417A GB 15440/37 A GB15440/37 A GB 15440/37A GB 1544037 A GB1544037 A GB 1544037A GB 480417 A GB480417 A GB 480417A
Authority
GB
United Kingdom
Prior art keywords
input
signal
grid
anode
change
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
GB15440/37A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB480417A publication Critical patent/GB480417A/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

Landscapes

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

Abstract

480,417. Valve amplifying circuits. PHILCO RADIO & TELEVISION CORPORATION. June 3, 1937, No. 15440. Convention date, July 3, 1936. [Class 40 (v)] In a high-frequency amplifier a signal of opposite phase to that applied to the control grid is applied to a second grid which has a greater capacitance to the anode than has the control grid. The ratio of the amplitudes of the signal applied to the two grids.is preferably inversely proportional to the capacities between the respective grids and the anode. The Figure shows a pentode with a tertiary winding L3 on the input transformer connected to the suppressor grid. The invention is applicable to signal or intermediate frequency amplifiers and enables high gain to be obtained with stability and renders the dynamic input admittance substantially zero. The high impedance input and output circuits which are employed cause the change in the input capacity of the valve consequent on change in bias to vary tuning so'that selectivity is reduced as stage gain is reduced.
GB15440/37A 1936-07-03 1937-06-03 Improvements in high frequency signal amplifiers Expired GB480417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88853A US2154327A (en) 1936-07-03 1936-07-03 Signal amplifier

Publications (1)

Publication Number Publication Date
GB480417A true GB480417A (en) 1938-02-22

Family

ID=22213874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15440/37A Expired GB480417A (en) 1936-07-03 1937-06-03 Improvements in high frequency signal amplifiers

Country Status (2)

Country Link
US (1) US2154327A (en)
GB (1) GB480417A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005576B (en) * 1954-11-06 1957-04-04 Lorenz C Ag Circuit arrangement for the neutralization of HF, in particular IF stages, with the aid of bridge circuits

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE476622A (en) * 1941-04-07
BE471791A (en) * 1945-08-27
US2770683A (en) * 1952-06-18 1956-11-13 Philco Corp Neutralized amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005576B (en) * 1954-11-06 1957-04-04 Lorenz C Ag Circuit arrangement for the neutralization of HF, in particular IF stages, with the aid of bridge circuits

Also Published As

Publication number Publication date
US2154327A (en) 1939-04-11

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