GB484423A - Improvements in electric amplifiers employing thermionic or like valves - Google Patents

Improvements in electric amplifiers employing thermionic or like valves

Info

Publication number
GB484423A
GB484423A GB80837A GB80837A GB484423A GB 484423 A GB484423 A GB 484423A GB 80837 A GB80837 A GB 80837A GB 80837 A GB80837 A GB 80837A GB 484423 A GB484423 A GB 484423A
Authority
GB
United Kingdom
Prior art keywords
impedance
load
amplifier
impedances
frequency dependent
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
GB80837A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB80837A priority Critical patent/GB484423A/en
Publication of GB484423A publication Critical patent/GB484423A/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)

Abstract

484,423. Valve amplifying circuits. GENERAL ELECTRIC CO., Ltd., and FARREN, L. I. Jan. 11, 1937, Nos. 808 and 34118. [Class 40 (v)] In a negative feedback amplifier variations with frequency of the input impedance Xo of the amplifier relatively to the impedance X connected to the input terminals is compensated by the provision of frequency dependent impedances in the feedback path. The invention may be applied to an amplifier in which frequency dependent impedances are provided in the feedback path as described in Specification 484,332 so that the output current or voltage on the load is stabilized and the output impedance is stabilized or matches the load or is less than the impedance of the output valve. The Figure shows an amplifier 5 feeding a load Z and having a feedback path Z1 .. Z7. The frequency dependent impedance according to the invention may be included in one of the potentiometers Z1, Z2 or Z4, Z5 or Z6, Z7. Alternatively or additionally the impedance Z3 in series with the load may be reactive or a reactance may be connected in series with the load. More than seven impedances may be included in the feed back path, and the impedances Z4, Z5 and Z1, Z2 or Z3 may be dispensed with. The Specification gives a mathematical analysis of the conditions to be satisfied for a large number of examples.
GB80837A 1937-01-11 1937-01-11 Improvements in electric amplifiers employing thermionic or like valves Expired GB484423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB80837A GB484423A (en) 1937-01-11 1937-01-11 Improvements in electric amplifiers employing thermionic or like valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB80837A GB484423A (en) 1937-01-11 1937-01-11 Improvements in electric amplifiers employing thermionic or like valves

Publications (1)

Publication Number Publication Date
GB484423A true GB484423A (en) 1938-05-05

Family

ID=9710855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB80837A Expired GB484423A (en) 1937-01-11 1937-01-11 Improvements in electric amplifiers employing thermionic or like valves

Country Status (1)

Country Link
GB (1) GB484423A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843671A (en) * 1954-05-19 1958-07-15 David Bogen & Company Inc Feed back amplifiers
US3204229A (en) * 1960-09-09 1965-08-31 Fischer & Porter Co Signal transmitter
FR2484170A1 (en) * 1980-06-09 1981-12-11 Pass Matvei Cascadable RF common grid power amplifier - uses compensating voltage feedback with input connection to tap on inductive divider between tetrode and screen grid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843671A (en) * 1954-05-19 1958-07-15 David Bogen & Company Inc Feed back amplifiers
US3204229A (en) * 1960-09-09 1965-08-31 Fischer & Porter Co Signal transmitter
FR2484170A1 (en) * 1980-06-09 1981-12-11 Pass Matvei Cascadable RF common grid power amplifier - uses compensating voltage feedback with input connection to tap on inductive divider between tetrode and screen grid

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