GB525953A - Improvements in or relating to thermionic amplifiers - Google Patents

Improvements in or relating to thermionic amplifiers

Info

Publication number
GB525953A
GB525953A GB708439A GB708439A GB525953A GB 525953 A GB525953 A GB 525953A GB 708439 A GB708439 A GB 708439A GB 708439 A GB708439 A GB 708439A GB 525953 A GB525953 A GB 525953A
Authority
GB
United Kingdom
Prior art keywords
noise
output
intermodulation products
amplifier
valve
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
GB708439A
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
Priority to BE482227D priority Critical patent/BE482227A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB708439A priority patent/GB525953A/en
Priority to FR863642D priority patent/FR863642A/en
Publication of GB525953A publication Critical patent/GB525953A/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
    • 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
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H03F1/28—Modifications of amplifiers to reduce influence of noise generated by amplifying elements in discharge-tube amplifiers

Landscapes

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

Abstract

525,953. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., HODGSON, K. G., and ROCHE, A. H. March 3, 1939, No. 7084. Drawings to Specification. [Class 40 (v)] In a multi-stage amplifier in which negative feedback is applied from the output to the input to reduce intermodulation products, an additional feedback is applied to an intermediate stage to alter the ratio between the " Johnson noise " voltage due to thermal agitation and the. Valve noise " voltage and compensated by a change in the amplifier gain so that the additional feedback unaffects either the total gain or the amount of the intermodulation products in the output. Preferably the " Johnson noise " and " valve noise " voltages are made equal, and their sum, at the output is made equal to the. effects of the intermodulation products. The Specification gives a mathematical analysis of the noise effects present in the amplifier and the effect of the negative feedback.
GB708439A 1939-03-03 1939-03-03 Improvements in or relating to thermionic amplifiers Expired GB525953A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE482227D BE482227A (en) 1939-03-03
GB708439A GB525953A (en) 1939-03-03 1939-03-03 Improvements in or relating to thermionic amplifiers
FR863642D FR863642A (en) 1939-03-03 1940-03-01 Improvements to negative feedback amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB708439A GB525953A (en) 1939-03-03 1939-03-03 Improvements in or relating to thermionic amplifiers

Publications (1)

Publication Number Publication Date
GB525953A true GB525953A (en) 1940-09-06

Family

ID=9826298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB708439A Expired GB525953A (en) 1939-03-03 1939-03-03 Improvements in or relating to thermionic amplifiers

Country Status (3)

Country Link
BE (1) BE482227A (en)
FR (1) FR863642A (en)
GB (1) GB525953A (en)

Also Published As

Publication number Publication date
FR863642A (en) 1941-04-05
BE482227A (en)

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