GB506652A - Improvements in electron discharge tube amplifiers - Google Patents

Improvements in electron discharge tube amplifiers

Info

Publication number
GB506652A
GB506652A GB33202/37A GB3320237A GB506652A GB 506652 A GB506652 A GB 506652A GB 33202/37 A GB33202/37 A GB 33202/37A GB 3320237 A GB3320237 A GB 3320237A GB 506652 A GB506652 A GB 506652A
Authority
GB
United Kingdom
Prior art keywords
length
line
feedback
amplifier
frequency
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
GB33202/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB506652A publication Critical patent/GB506652A/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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers

Landscapes

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

Abstract

506,652. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., BARNARD, R. M., and ROCHE, A. H. Dec. 1, 1937, No. 33202. [Class 40 (v)] In a negative feedback amplifier the feedback path is constituted by a transmission line of predetermined characteristic impedance and having a length not exceeding the wavelength of the maximum frequency handled or by a short-length of coaxial cable transmission line. The Figure shows an amplifier with feedback from a resistance R1 in the cathode of the output stage to a resistance R2 in the cathode circuit of the input stage. In a modification a bridge arrangement of the feedback path is used for both the input and output. The length of the line may be comparable to the wavelength used or may be a small fraction of the wavelength corresponding to the highest frequency at which the product of the gain and the feedback exceeds unity and the terminating resistances of the line may differ from its characteristic impedance. By varying the length of the line between one half and a whole wavelength corresponding to the frequency at which instability is liable to occur the frequency discrimination of the amplifier may be controlled. Specification 374,130 is referred to.
GB33202/37A 1937-12-01 1937-12-01 Improvements in electron discharge tube amplifiers Expired GB506652A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB230988X 1937-12-01
GB140138X 1938-01-14

Publications (1)

Publication Number Publication Date
GB506652A true GB506652A (en) 1939-06-01

Family

ID=26250182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33202/37A Expired GB506652A (en) 1937-12-01 1937-12-01 Improvements in electron discharge tube amplifiers

Country Status (4)

Country Link
BE (1) BE431370A (en)
CH (1) CH230988A (en)
FR (1) FR846761A (en)
GB (1) GB506652A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566057A (en) * 1947-10-02 1951-08-28 Gen Electric Audio amplifier system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566057A (en) * 1947-10-02 1951-08-28 Gen Electric Audio amplifier system

Also Published As

Publication number Publication date
CH230988A (en) 1944-02-15
FR846761A (en) 1939-09-26
BE431370A (en)

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