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GB514059A - Improvements in or relating to thermionic amplifiers - Google Patents

Improvements in or relating to thermionic amplifiers

Info

Publication number
GB514059A
GB514059A GB12196/38A GB1219638A GB514059A GB 514059 A GB514059 A GB 514059A GB 12196/38 A GB12196/38 A GB 12196/38A GB 1219638 A GB1219638 A GB 1219638A GB 514059 A GB514059 A GB 514059A
Authority
GB
United Kingdom
Prior art keywords
feed
valve
phase
grid
resistance
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
GB12196/38A
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 BE433886D priority Critical patent/BE433886A/xx
Priority to NL57008D priority patent/NL57008C/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB12196/38A priority patent/GB514059A/en
Priority to US266128A priority patent/US2252007A/en
Priority to FR852819D priority patent/FR852819A/en
Publication of GB514059A publication Critical patent/GB514059A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/005—Reducing noise, e.g. humm, from the supply
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

514,059. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., JACOBSEN, B. B., and ROCHE, A. H. April 23, 1938, No. 12196. [Class 40 (v)] In negative feed-back amplifiers in which the phase of the feed-back voltage on the control grid is changed due to the high impedance of the signal source, a second feed-back whose phase is not affected is applied to the screen electrode of the valve. The feed-back voltage derived from the output bridge consisting of resistance R5, R6, R7 and the plate cathode impedance of the valve VI is developed across resistance R8 in the grid circuit of the valve. The resultant feed-back is modified in phase due to the impedance of generator G. The feed-back voltage is also applied via condenser C1, without appreciable phase shift, to the screen grid of the valve. The resultant feed-back effect in the anode circuit is the vector sum of the individual feed-backs and is of more correct phase than that due to the control grid alone. The connections of the generator and condenser C1 to resistance R8 may be made adjustable to vary the relative amounts of feed-back. In a modification, Fig. 2 (not shown), the signal voltage and feed-back are applied to both the control and suppressor grids of a pentode, the auxiliary feed-back being applied to the screen grid.
GB12196/38A 1938-04-23 1938-04-23 Improvements in or relating to thermionic amplifiers Expired GB514059A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE433886D BE433886A (en) 1938-04-23
NL57008D NL57008C (en) 1938-04-23
GB12196/38A GB514059A (en) 1938-04-23 1938-04-23 Improvements in or relating to thermionic amplifiers
US266128A US2252007A (en) 1938-04-23 1939-04-05 Thermionic amplifier
FR852819D FR852819A (en) 1938-04-23 1939-04-07 Thermionic amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12196/38A GB514059A (en) 1938-04-23 1938-04-23 Improvements in or relating to thermionic amplifiers

Publications (1)

Publication Number Publication Date
GB514059A true GB514059A (en) 1939-10-30

Family

ID=10000096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12196/38A Expired GB514059A (en) 1938-04-23 1938-04-23 Improvements in or relating to thermionic amplifiers

Country Status (5)

Country Link
US (1) US2252007A (en)
BE (1) BE433886A (en)
FR (1) FR852819A (en)
GB (1) GB514059A (en)
NL (1) NL57008C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE874606C (en) * 1943-05-03 1953-04-23 Aeg Broadband amplifier with negative feedback via several stages
US2563245A (en) * 1944-05-12 1951-08-07 Cossor Ltd A C Voltage combining circuits
US2566057A (en) * 1947-10-02 1951-08-28 Gen Electric Audio amplifier system
US2906937A (en) * 1956-12-24 1959-09-29 Daystrom Inc Adjustable electric braking circuit for servo-mechanism
US20070280138A1 (en) * 2006-06-01 2007-12-06 Stern Donald S Information broadcasting system and method

Also Published As

Publication number Publication date
FR852819A (en) 1940-03-04
NL57008C (en)
US2252007A (en) 1941-08-12
BE433886A (en)

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