GB1271509A - Improvements in or relating to amplifier arrangements - Google Patents

Improvements in or relating to amplifier arrangements

Info

Publication number
GB1271509A
GB1271509A GB3726768A GB3726768A GB1271509A GB 1271509 A GB1271509 A GB 1271509A GB 3726768 A GB3726768 A GB 3726768A GB 3726768 A GB3726768 A GB 3726768A GB 1271509 A GB1271509 A GB 1271509A
Authority
GB
United Kingdom
Prior art keywords
amplifier
relating
impedance
amplifier arrangements
feedback
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
GB3726768A
Inventor
Kenneth George Perkins
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3726768A priority Critical patent/GB1271509A/en
Publication of GB1271509A publication Critical patent/GB1271509A/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
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • 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
    • H03F1/347—Negative-feedback-circuit arrangements with or without positive feedback using transformers
    • 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
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements

Landscapes

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

Abstract

1,271,509. Amplifiers. PLESSEY CO. Ltd. 4 Aug., 1969 [5 Aug., 1968], No. 37267/68. Heading H3W. In a feedback amplifier the effective impedance presented by the feedback impedance R 2 to the output of the amplifier A is reduced by means of an impedance transforming networkas comprising an autotransformer T interposed between the output of the amplifier and the feedback impedance.
GB3726768A 1968-08-05 1968-08-05 Improvements in or relating to amplifier arrangements Expired GB1271509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3726768A GB1271509A (en) 1968-08-05 1968-08-05 Improvements in or relating to amplifier arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3726768A GB1271509A (en) 1968-08-05 1968-08-05 Improvements in or relating to amplifier arrangements

Publications (1)

Publication Number Publication Date
GB1271509A true GB1271509A (en) 1972-04-19

Family

ID=10395075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3726768A Expired GB1271509A (en) 1968-08-05 1968-08-05 Improvements in or relating to amplifier arrangements

Country Status (1)

Country Link
GB (1) GB1271509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466746A1 (en) * 2010-12-16 2012-06-20 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Low noise amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466746A1 (en) * 2010-12-16 2012-06-20 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Low noise amplifier
WO2012080126A1 (en) * 2010-12-16 2012-06-21 Telefonaktiebolaget L M Ericsson (Publ) Low noise amplifier
US8965322B2 (en) 2010-12-16 2015-02-24 Telefonaktiebolaget L M Ericsson (Publ) Low noise amplifier

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