GB495058A - Means for controlling the gain of wave amplifying devices - Google Patents

Means for controlling the gain of wave amplifying devices

Info

Publication number
GB495058A
GB495058A GB13102/37A GB1310237A GB495058A GB 495058 A GB495058 A GB 495058A GB 13102/37 A GB13102/37 A GB 13102/37A GB 1310237 A GB1310237 A GB 1310237A GB 495058 A GB495058 A GB 495058A
Authority
GB
United Kingdom
Prior art keywords
gain
controlling
amplifying devices
wave amplifying
per cent
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
GB13102/37A
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.)
ALEXANDER WILLIAM MONTGOMERY
STC PLC
Original Assignee
ALEXANDER WILLIAM MONTGOMERY
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 ALEXANDER WILLIAM MONTGOMERY, Standard Telephone and Cables PLC filed Critical ALEXANDER WILLIAM MONTGOMERY
Publication of GB495058A publication Critical patent/GB495058A/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
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal
    • H04B3/12—Control of transmission; Equalising by pilot signal in negative-feedback path of line amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

An inductance coil is provided with a core of magnetic material of which the permeability varies rapidly with temperature. Such material may consist of an alloy containing 12,5 per cent of molybdenum, 80 per cent of nickel, and the rest mainly iron.
GB13102/37A 1937-05-07 1937-05-07 Means for controlling the gain of wave amplifying devices Expired GB495058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB205686X 1937-05-07

Publications (1)

Publication Number Publication Date
GB495058A true GB495058A (en) 1938-11-07

Family

ID=10148066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13102/37A Expired GB495058A (en) 1937-05-07 1937-05-07 Means for controlling the gain of wave amplifying devices

Country Status (4)

Country Link
CH (1) CH205686A (en)
FR (1) FR837622A (en)
GB (1) GB495058A (en)
NL (1) NL50007C (en)

Also Published As

Publication number Publication date
FR837622A (en) 1939-02-15
NL50007C (en)
CH205686A (en) 1939-06-30

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