GB516697A - Improvements in or relating to wave amplifying systems - Google Patents

Improvements in or relating to wave amplifying systems

Info

Publication number
GB516697A
GB516697A GB19901/38A GB1990138A GB516697A GB 516697 A GB516697 A GB 516697A GB 19901/38 A GB19901/38 A GB 19901/38A GB 1990138 A GB1990138 A GB 1990138A GB 516697 A GB516697 A GB 516697A
Authority
GB
United Kingdom
Prior art keywords
bridge
arms
impedance
output
relating
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
GB19901/38A
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB516697A publication Critical patent/GB516697A/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

516,697. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., and ROCHE, A. H. July 5, 1938, No. 19901. [Class 40 (v)] In an amplifier in which the feed-back is small and is varied to control the gain the output impedance is maintained substantially constant by altering the ratio between the current and the voltage feed-back. Two of the arms of the output bridge may consist of variable resistances conjointly operated, Fig. 1 (not shown). An impedance Rf may be connected across a diagonal of the output bridge and varied simultaneously with one of the arms Ra of the bridge. Any or all of the bridge arms may be a coupled impedance to give desired gain-frequency or impedancefrequency characteristics.
GB19901/38A 1938-07-05 1938-07-05 Improvements in or relating to wave amplifying systems Expired GB516697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB227708X 1938-07-05

Publications (1)

Publication Number Publication Date
GB516697A true GB516697A (en) 1940-01-09

Family

ID=10184796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19901/38A Expired GB516697A (en) 1938-07-05 1938-07-05 Improvements in or relating to wave amplifying systems

Country Status (5)

Country Link
BE (1) BE434920A (en)
CH (1) CH227708A (en)
DE (1) DE896057C (en)
FR (1) FR854917A (en)
GB (1) GB516697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE820451C (en) * 1950-02-09 1951-11-12 Telefunken Gmbh Low frequency amplifier with negative voltage feedback

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857401C (en) * 1942-05-28 1952-11-27 Siemens Ag Multi-stage amplifier with gain control by changing the negative feedback
DE893205C (en) * 1949-11-11 1953-10-15 Atlas Werke Ag Circuit for amplifying and measuring the difference between variable, in particular biological, voltages

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB317005A (en) * 1928-08-08 1930-10-22 Standard Telephones Cables Ltd Electric signal wave amplifying and translation systems
GB435646A (en) * 1933-09-26 1935-09-25 Standard Telephones Cables Ltd Vacuum tube amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE820451C (en) * 1950-02-09 1951-11-12 Telefunken Gmbh Low frequency amplifier with negative voltage feedback

Also Published As

Publication number Publication date
CH227708A (en) 1943-06-30
BE434920A (en)
DE896057C (en) 1953-11-09
FR854917A (en) 1940-04-27

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